When she first came to Earth, Miss Martian was a bubbly, exceptionally sweet, polite, and caring, although occasionally shy, "young" Martian girl, who longed to fit in on Earth and be a member of the Team. However, being from Mars and having never really interacted with humans before, she was frequently unfamiliar with Earth customs. She felt especially uncomfortable with her telepathy, as on Mars, it is the prime form of communication. She was also quite inexperienced, and eager to please.
By 2016, she has become considerably more serious but still retains her caring side. She's become more experienced and adept at using her powers, and isn't afraid to use extreme measures to extract information, without showing remorse afterwards. This changed after she did the procedure on Aqualad; still hating him for Artemis's murder, she used her mindblast on him, extracting all information from him. The discovery that he was undercover shocked her, and made her reconsider her use of her powers. She became more timid, and reluctant to use even the most basic forms of telepathy.
Miss Martian's true appearance is that of a grotesque monster with white skin, long limbs and a hunchback. However, as a shape-shifter, she can model her appearance to her desire, which is usually that of a green-skinned female humanoid with amber eyes and shoulder-length red hair, though after five years, she now keeps her hair at a shorter length, but it has since grown longer over the months. She also has freckles on her cheeks.
Her former primary outfit consists of a short-sleeved white top with a red X on it, along with blue skirt, cape, gloves, and ankle high boots. For covert work, she dons a long-sleeved black suit with the same red X, black shoes, and her blue cape; the overall style is similar to the clothing worn by the Martian Manhunter. While at Superman's Fortress of Solitude, her suit remained in the same style, except white. After five years, her covert ops costume became her primary outfit.
In casual situations, she takes the appearance of a green skinned high school student, wearing a white or light pink T-shirt under a short-sleeved crop top sweater, skirt, knee-high socks with brown or dark blue shoes, and a headband to keep her hair back. The sweater, skirt, and headband are either red, purple, or blue. She can use her shape-shifting powers to switch from one outfit to another as needed. When attending high school, she keeps her casual clothes on and merely changes her skin color to that of a Caucasian girl (her eyes, hair and freckles remain unchanged). She now wears a yellow or purple long sleeved cardigan over a white top and dark jeans.
M'gann M'orzz was born 48 Earth years ago on the planet Mars.  She has twelve sisters and seventeen brothers, and an extended family of 300 cousins.  As a white Martian, M'gann suffered rejection from the predominant Green Martians. She grew up watching Earth television, and following Martian Manhunter's adventures on Earth. She was especially fond of Hello, Megan!, a comedy show that lasted only one season; she was drawn to the main character, Megan Wheeler, because of the similarity of their names, and because all her problems were solved in 22 minutes.
- Main article: Miss Martian in July 2010
Miss Martian was introduced to Robin, Aqualad, Kid Flash and Superboy on July 8, and moved into the Cave. She had difficulty with the new surroundings, as interaction with Earthlings was so much different from her family on Mars, or living with her uncle. Her use of telepathy was especially deemed an invasion of privacy; especially Superboy was angry at her for it. On their first unofficial mission, a commotion at the Happy Harbor Power Plant, she used her powers sparingly. She did not do well that day; she figured their enemy Mister Twister was a robot, and thought it was Red Tornado who was testing them. She was wrong, and again, Superboy was harsh to her. Eventually, her powers did have the key, as she impersonated Red Tornado to bait Mister Twister into a trap. She also crushed the suit's pilot and revealed that she was right: it was piloted by a robot.
On the next mission, to Santa Prisca, Miss Martian figured out a way to make her powers even more useful. She established a mind link with which the members of the Team could communicate telepathically.
- Main article: Miss Martian in August 2010
Miss Martian, along with the rest of the Team, began taking training sessions with Black Canary. The Team was assigned to guard shipments of the disassembled Amazo. Professor Ivo was able to retrieve and reassemble the robot, but the Team defeated Amazo and captured Ivo.
Artemis joined the Team just before they were assigned a mission by Red Arrow: to protect Serling Roquette from the League of Shadows while she worked on a counter-weapon to the Fog she developed. Though initially put off by Artemis's outspokenness, M'gann warmed to her new teammate and welcomed her to the Team once the mission was complete.
The Team took a class in espionage from Captain Atom. When the lecture proved boring, Captain Atom assigned them a cold case mission–to determine whether or not Air Force captain Nathaniel Adams was framed for the murder of his superior during the Vietnam War. The Team was ultimately successful in determining Adams' innocence.
The Team was later sent by Red Tornado to protect the Helmet of Fate following Kent Nelson's disappearance. While the Helmet was kept safe, Kent died defending it. Two days later, M'gann and the others attended Kent's funeral.
Later, Batman ordered the Team to track Clayface through Gotham City while he worked on a way to defeat him. The Team engaged Clayface against Batman's orders–the Team was soundly defeated, but saved by Batman at the last moment. Taking the night off following their defeat, M'gann attempted some cooking with the help of Superboy.
- Main article: Miss Martian in September 2010
Batman sent the Team to Bialya, where they encountered Psimon, who blocked their memories of the prior six months. Miss Martian was able to reunite with Robin, Kid Flash and Artemis, and restore their missing memories. Sensing Superboy in pain, she went to rescue him, and found the Bialyan base. She faced off against Psimon again and won, saving Superboy and Sphere.
Aqualad invited Superboy and Miss Martian to visit Atlantis with him. They met Kaldur's parents, then went to the capital, where they helped thwart Ocean-Master's plot to steal Queen Mera's powers.
M'gann was present in the Cave when Red Inferno and Red Torpedo attacked. She was held captive in a cage of fire until rescued by Artemis. Like the rest of the Team, she was rendered unconscious by Red Tornado, who fled with his "siblings". Miss Martian, like the rest of the Team, was furious to discover Aqualad had withheld information about a possible mole on the Team, and frustrated by Superboy's overprotective reaction. Batman assigned the Team to investigate reports of gorilla attacks in India. After defeating the Brain and freeing his Kobra-Venom-enhanced animal slaves, M'gann was satisfied with Aqualad's reasons for keeping the secret.
The Team was then sent to investigate reports of another Kobra-Venom operation in Bwunda. The Team was ambushed and captured by the Brain's gorillas. Having gained telepathy, the enslaved gorillas sensed M'gann's power and sought out her help. Together they were able to rescue the gorillas's captive children, free M'gann's team and liberate the gorillas.
- Main article: Miss Martian in October 2010
The Team was sent to destroy the central control system being used by the Injustice League to attack a number of cities worldwide with giant plants. They successfully destroyed the control plant, and the subsequent arrival of the Justice League was enough to force their enemies to surrender.
The Team was introduced to Zatanna. They went on an unauthorized mission to find Red Tornado. They discovered the robot had not betrayed them and, together with Red Inferno and Red Torpedo, they were able to destroy Red Volcano and prevent the Yellowstone super-volcano from devastating the planet.
The Team took part in a telepathic training simulation run by Martian Manhunter. It went wrong when Artemis's "death" caused Miss Martian to take control, causing them to forget it was not real. The simulation ended when M'gann, the last survivor, was "killed" by Manhunter. M'gann was riddled with guilt and, like the rest of the Team, was left devastated. The Team was given therapy by Black Canary. M'gann admitted she was uncomfortable with her powers, and Canary suggested she train with her uncle to gain confidence.
- Main article: Miss Martian in November 2010
After all the adults in the world disappeared, M'gann and the Team worked with Zatanna to find the cause. With help from Captain Marvel they were able to communicate with the adults in their own separate dimension and coordinate an attack on Klarion and his group of sorcerers, merging the dimensions back into one.
Later, M'gann attended Kid Flash's "surprise" birthday party at the Cave. She then joined the joint League-Team mission to disable the ice fortresses freezing North America.
M'gann joined a mission to Qurac to discover why the nation's leader decided to allow Bialya to absorb Qurac. They saved Marie Logan and her son from Bialyan tanks, though Gar was injured during a reprisal attack. M'gann saved Gar's life with a blood transfusion. The Team went on to the capital, where they encountered Psimon, who was controlling Harjavti. M'gann defeated Psimon once more, but not before he and Queen Bee discovered her true form. The Team then asked M'gann about Hello, Megan! and she admitted she had based her human self on Megan/Marie when she came to Earth. She was later confronted by Queen Bee, who threatened to reveal M'gann's true form if she did not cooperate.
- Main article: Miss Martian in December 2010
M'gann and Conner visited the Logans before going to Dhabar to protect Harjavti from a suspected attack by Queen Bee. They and Superman intervened as Deadshot apparently attempted to kill Harjavti.
Miss Martian and the rest of the Team, now including Rocket, responded to an alert that Cheshire had been spotted. They found they had been lured into a trap, but were nonetheless successful in defeating their enemies and capturing the case that had eluded them previously. Realizing the trap meant there must really be a mole, Superboy, Artemis and Miss Martian revealed their secret links to their enemies to the rest of the Team, and found acceptance. The Team ambushed Lex Luthor, Queen Bee and their allies on Santa Prisca and captured several villains, though Luthor and Bee escaped.
They returned to the Cave triumphant, but were shocked to find Batman waiting to tell them the mole was Red Arrow. M'gann, Aqualad, Superboy and Artemis went to find Roy, while the others investigated Red Tornado's mysterious shutdown. They found Red Arrow, who explained he had unwittingly been under the Light's control. The Team infiltrated the Watchtower and freed the League from the Light's control.
Miss Martian and Superboy were locked in a passionate hug when she sensed Superman's presence. She left so her beau and the Man of Steel could talk in private.
After Superboy investigated further in Siberia, discovered the Light's involvement, and recovered two Babylonian artifacts, M'gann noted that the two fit together, and wondered why two Babylonian artifacts were buried so far away from each other.
- Main article: Miss Martian in December 2015
Miss Martian participated in a mission in Metropolis to protect a rally held by Noor Harjavti. During the rally, the heroes spotted Devastation hiding in the crowd, but Superman, Superboy and Devastation abruptly disappeared with a bright flash of light.
When Zeta radiation was discovered emanating from the Moon, Nightwing sent Miss Martian and Lagoon Boy to investigate aboard the Bio-Ship. The pair found the culprit—an alien vessel had teleported away the missing superhumans, and it was moving away from the Earth. The Bio-Ship pursued the ship, and Megan phased inside the vessel once she was close enough. Inside, Miss Martian found the abductees being held captive by crystalline orbs. She destroyed the orbs.
After seeing the determination of his captives, the ship's owner, Kylstar, decided to free the captives. The Earth heroes and villains who were unwilling to stay were teleported away. They materialized on the Collector of Worlds's ship, and fought a pitched battle against the Collector, who had encased Metropolis in a force barrier and wanted to preserve it. Ultimately, the heroes persuaded him to put everything back to normal, and leave the Earth alone.
- Main article: Miss Martian in January 2016
Miss Martian joined Delta Squad in successfully flushing out and capturing Clayface in the Gotham City sewers. Following the revelation that aliens called Kroloteans had abducted and replaced some humans, Miss Martian joined a briefing aboard the Watchtower, where Adam Strange revealed that the Kroloteans teleported to Earth from a distant planet called Rann. Miss Martian, Superboy, Beast Boy, and Adam Strange were sent to investigate.
Upon arriving in Rann, they found and infiltrated the Krolotean base, and successfully destroyed all the Zeta platforms. The Kroloteans pursued them. Miss Martian and Beast Boy were captured, but were rescued by Superboy and Alanna. Miss Martian forcibly mentally interrogated the Krolotean leader, reducing him to a vegetative state.
Upon returning to Earth, Miss Martian shared her discoveries with the League—the reasons behind the Kroloteans' presence on Earth and why the League were wanted criminals. Miss Martian was then sent to the Hall of Justice to interrogate another Krolotean. She found the location of the remaining Kroloteans still stranded on Earth—Malina Island.
As others assaulted the island, Miss Martian and Martian Manhunter disguised themselves as Kroloteans, and successfully downloaded all the information from the Kroloteans' systems before the island was destroyed by a bomb of unknown alien origin.
While investigating, Cassie made her way to her and informed her Psimon was present, along with Devastation, Icicle Jr., Mammoth and Shimmer. M'gann shut down the telepathic link, and they prepared to warn the others. Wonder Girl was discovered, and an alarm was sent off, forcing Miss Martian and Wonder Girl to retreat to the rendezvous point without the others. They were later joined by Bumblebee, who told them of Batgirl's capture.
Miss Martian infiltrated the facility again, and took down Shimmer. Disguised as her, she locked down the hangar, and was detected by Psimon. She made no effort to hide it, and engaged Psimon in a psychic battle. Bumblebee distracted Psimon, leaving Miss Martian free to take care of Icicle. Batgirl, liberated, flew a plane full of abducted teenagers down the runway, but the plane was damaged and it fell off the cliff at the end. Neither Wonder Girl not Miss Martian had the strength to stop its fall, so Miss Martian called in the Bio-Ship. It grabbed the fuselage, and they made it to safety.
At the debriefing, Miss Martian explained that when she knocked out Shimmer, she discovered Queen Bee was only working as a middle man in the abductions, but they had no idea who her partner was. Nightwing congratulated them on the successful mission.
- Main article: Miss Martian in March 2016
Miss Martian took part a mission in Cape Canaveral to protect the launch of the Earth-Mars Communication Satellite, which also saw Artemis return to the Team. During the mission, M'gann participated in a press conference disguised as Martian Manhunter.
When Manta Troopers attacked the launch site from the sea, Miss Martian went underwater to assist Lagoon Boy. Although she was able to destroy Black Manta's underwater missile platform, she was unable to rescue La'gaan from being captured. The mission ended in disaster with the satellite destroyed, and Artemis apparently killed by Kaldur'ahm in combat.
After Kaldur'ahm destroyed Mount Justice with an alien bomb and abducted members of the Team, Miss Martian joined in the search for them, leading to a spaceship hidden in the ocean depths, Miss Martian infiltrated it and rescued the captured Beast Boy and Impulse, and while returning to the extraction point, met with Kaldur'ahm. Believing him to be a murderer, she attacked and destroyed his mind. Only belatedly did she realize that Artemis's death was a ruse. Dazed by her discovery, Miss Martian traveled with Beast Boy to the docking bay, but she was ambushed and knocked unconscious by Black Beetle. Blue Beetle's timely intervention saved the mission, and all Team members and abductees escaped aboard the Bio-ship.
M'gann was with Mal Duncan and Superboy in the library at the Hall of Justice, gathering their belongings salvaged from Mount Justice. Captain Marvel, Zatanna and Bumblebee were also present. Captain Marvel and Zatanna accosted L-Ron, who generated a force field around the Hall and Despero then arrived, attacking Marvel and using his powers to shut down Zatanna's mind. Superboy and Bumblebee left the library as Mal informed M'gann that communications and zeta tubes were not functioning.
The two then left the library, with M'gann using her telekinesis against Despero. When that failed to contain the alien, Mal suggested M'gann brain blast Despero, but M'gann would not do it.
Despero ultimately subdued Marvel—who had transformed into Billy Batson after using his transformation lightning to fry Despero—and took down Superboy, prompting Bumblebee to plead with M'gann to try a mental attack. M'gann remembered what happened when she did that to Kaldur on the Reach research ship, and refused again. Bumblebee went after Despero but was subdued and, just as Despero was about to crush Bumblebee under his foot, Mal appeared, wearing the armor that once belonged to Guardian.
Communicating telepathically, Mal told M'gann he was buying the others time to come up with a plan, so M'gann escaped with Superboy and Bumblebee. As the trio escaped on an elevator, Superboy recovered. M'gann told him she couldn't attack Despero telepathically, so Superboy told her she needed to come up with another idea before something happened to Mal.
M'gann reached out to Zatanna, Batson and Bumblebee telepathically, snapping them out of their trances. Zatanna, in possession of Mal Duncan's mind, reflected Despero's attack back at him, putting the alien in a trance. This allowed Superboy to defeat him. L-Ron was incensed at their lack of sportsmanship, and upon his destruction set off an explosion that caused the Hall of Justice to crumble. Captain Marvel safeguarded M'gann and the others from the falling debris.
Posing as John Jones, M'gann arrived at her uncle's apartment, where she received a phone call from Lagoon Boy but chose not to answer it. As she prepared to water the plants, Superboy knocked on the door and said he needed to speak with her. M'gann let Superboy into the apartment.
M'gann was with Team members, Adam Strange and Green Beetle at STAR Labs. Nightwing wanted M'gann to read Green Beetle's mind and confirm his story about coming to Earth to help. M'gann was hesitant, but Green Beetle tried to reassure her. However, his attempt at a smile startled her. Nightwing told M'gann that he was unfamiliar with the Martian etiquette, but this was the only way to confirm Green Beetle's story. As M'gann established telepathic contact with Green Beetle, he learned she was really a white Martian and that she had a previous bad experience with her powers. He thus volunteered to offer his most recent memories. After a brief period, M'gann told the others that she had confirmed Green Beetle's account.
After Nightwing dismissed everyone, Lagoon Boy asked to speak to M'gann. After looking at Superboy, who just shrugged, M'gann said Lagoon Boy could join her in Chicago at her uncle's apartment.
As La'gaan and M'gann arrived in Chicago, La'gaan inquired about what was going on between her and Superboy, but the two were then ambushed by Deathstroke and Tigress. Communicating telepathically, Tigress explained to M'gann that she needed her help to repair Kaldur's mind and needed to make the abduction look good to avoid raising suspicion. Deathstroke ultimately took down La'gaan, and Tigress threw several bombs that ignited flames to weaken M'gann, allowing Deathstroke to place an inhibitor collar on her. Deathstroke and Tigress then took M'gann prisoner aboard the Manta-Flyer.
Miss Martian woke up aboard the Manta-Sub, where Black Manta ordered her to help Kaldur or die. He told Miss Martian that Deathstroke was watching her on another ship, out of her telepathic range, and would selectively reactivate her telepathy. However, if Deathstroke suspected Miss Martian used her telepathy for any reason other than to help Kaldur, he would trigger a bomb on the collar. Manta left Tigress with her, and she ordered Miss Martian to get started.
Communicating telepathically, M'gann told Artemis she doubted she could fix Kaldur's mind—tearing apart someone's mind is an easy task, but piecing a mind back together is more difficult. Furthermore, her presence in Kaldur's mind might be considered a threat. Out of options, Artemis told M'gann to take her into Kaldur's mind as well.
- Upon entering Kaldur's mind, M'gann had to remind Artemis the two are not really underwater, but the two were attacked by a wraith of Tula. While Artemis applied what Kaldur taught her to remain safe, M'gann's lingering guilt made her susceptible to Tula's assault. M'gann only overcame her guilt when Artemis brought Aqualad to her, and allowed her to apologize. She then worked with Aqualad to begin restoring his mind
Six hours later, Black Manta returned to check on Miss Martian's progress. She told him repairing Kaldur's mind would take days, if not weeks. Manta warned Miss Martian against stalling, but realized she made actual progress when Kaldur called out for his father. Pleased with her cooperation, he told her to continue working so he would spare her life.
While M'gann was able to cure Aqualad quickly, she, Tigress, and Aqualad kept up the charade that Kaldur'ahm was still in a coma. Unfortunately, Manta became impatient and gave a 24-hour ultimatum. Fortunately, Cheshire and Sportsmaster attacked; when the guards swarmed the room, M'gann was able to use a guards gun to destroy the security camera. She was knocked out, but was able to recover in time to force Sportsmaster and Cheshire into a shared mind link with Tigress and Aqualad, wherein they explained the truth of what had really happened. Cheshire was convinced, and though it took a little while Sportsmaster was as well. Miss Martian and Cheshire pretended that they were going to allow Miss Martian to kill Aqualad and Black Manta. Aqualad then "miraculously" regained consciousness and tackled her, allowing M'gann to slip away and flee the submarine. Sportsmaster destroyed all evidence of Tigress disabling the power restraints on Miss Martian, allowing Aqualad to resume his deep cover role without endangering M'gann.
As Nightwing piloted the Bio-Ship, M'gann telepathically searched for the rest of the Team but could not find them. Nightwing suggested they restart the investigation where the Team first disappeared. There, Nightwing and M'gann each blamed themselves for how events had unfolded. M'gann then realized that the two needed to stop blaming themselves, save the Team, then save Blue Beetle. The conversation was disrupted by a clanging sound, followed by a series of familiar bleeps. When they unlocked a door, they found Sphere.
Sphere led the two to where the Team members were being held, where they took down several Reach soldiers. When the door to the stasis chamber opened, they found that Arsenal and the four runaways had freed the Team. Everyone then fled to the Bio-Ship.
Miss Martian traveled to Atlantis to pick up Lagoon Boy, because she desperately needed to talk with him. He welcomed her with a powerful hug, but his mood soon changed when he heard she wanted to talk. They left for Büdhaven in the Bio-Ship.
On their way, Miss Martian broke up with La'gaan. She felt he would only ever be her rebound guy, and he deserved better. He was angry at it, but could do little about it.
Posing as Deathstroke at the summit between the Light and the Reach, Miss Martian "shot" Artemis and Aqualad after it was revealed that they were double agents. When Aqualad and Artemis were done playing dead, "Deathstroke" telekinetically floated a sword at Vandal Savage's neck. She explained that she was Miss Martian and the whole "shooting" was a result of Hollywood special effects. Aqualad then introduced the Team, who came into the cave to stop the villains. Dozens of League of Shadows agents came in, and fought the Team.
Vandal Savage then activated a ring from his finger, and Klarion appeared. Klarion transformed Deathstroke's sword into a fire serpent, and left through a portal with Vandal Savage. The snake wrapped around Miss Martian and was about to bite her when Lagoon Boy jumped into the serpent's mouth and transformed into to a puffer fish, breaking the snake apart. He caught M'gann and she thanked him. They quickly picked new targets and resumed the fight.
Miss Martian, Superboy and Adam Strange arrived at the court at which the six Justice League members were standing trial. She told Icon they had evidence to clear the Leaguers but Icon told her it was too late. Miss Martian and Superboy appealed to the Tribunal, who admitted the evidence was compelling but the court had already ruled. When Icon objected, the Tribunal asked for something "more". Miss Martian and Superboy improvised, saying that the case was a chance for the court to demonstrate justice prevailed on Rimbor, that more cases would thus be brought to the court and thus the more "mores" the tribunal would receive.
As the Tribune privately discussed the matter, Miss Martian admitted to Superboy that their deteriorated relationship was her fault and that she knew he was dating Wendy Harris, but Superboy replied he was acting as a sounding board between Wendy and her real boyfriend, Marvin White. The Tribunal then exited their chambers and announced all charges against the Leaguers had been dropped. Miss Martian, Superboy and Adam Strange then teleported back to Earth.
When magnetic field disruptors planted by the Reach threatened the Earth, Miss Martian joined 39 other heroes of Earth in a briefing in Metropolis. The heroes would use a computer virus provided by Lex Luthor to safely disable the disruptors. The heroes were paired off with another into twenty squads: one member would run interference against weapons guarding the disruptors, allowing the other to get close enough to plant the virus. 
Within thirty minutes, all squads had succeeded in their mission.
Miss Martian and Superboy were in the memorial garden, observing Robin and Wonder Girl. Superboy asked how long they had been a couple and Miss Martian replied that Cassie got the courage to kiss Robin after realizing how short life was when Wally passed away. The two agreed courage could be hard to come by, but they were then summoned by Aqualad to the mission room. There, Batman informed the Team the Watchtower would serve as their headquarters because the Team earned the right to fight alongside the Justice League. Aqualad then assigned Miss Martian, Superboy and Beast Boy to Alpha Squad to go to Mars to assist B'arzz O'oomm.
Powers and abilities
- Martian physiology:
- Shape-shifting: She can change her form on a cellular level, completely altering her physical appearance, including her organic clothing, allowing her to mimic other people or animals and other creatures. At first, she found male forms more difficult, but eventually mastered them. Her power is not restricted to humanoid forms; in order to fight off Ivo's MONQIs, she grew several extra arms, and to both survive and maneuver underwater, she grew gills and a mermaid tail.
- Camouflage:  making her almost—but not completely—invisible.  Her Bio-Ship also has a camouflage mode that she can activate telepathically.
- Super strength: Like all Martians, Miss Martian has strength above that of a typical human..
- Durability:  Martians are also immune to human diseases.
- Density shifting: An advanced technique, density shifting enables Martians to move through solid objects . Though she did not originally have the ability, she mastered it by 2016.
- Telepathy: Telepathy comes naturally to Martians; she can read minds, mentally communicate with others, and project her thoughts in other people's minds. She initially struggled with other people's personal boundaries on Earth. She often uses a telepathic link with her teammates, which makes communications easier and untraceable. Megan can also telepathically connect with her Bio-Ship. After a botched telepathic training simulation, J'onn revealed that in terms of raw power, her telepathy is on a level beyond any he has encountered, including himself. 
- Brain blast: Miss Martian was able to project a powerful "Mental blast" than can hit the target mentally or leave it unconscious.
- Psychic illusion: Miss Martian can project realistic illusions in other people's minds. She was able to project an illusion in J'onns minds to make him believe than he was burning.
- Mind control: Megan can control the thoughts and actions of others. Miss Martian was able to implant words in Professor Ojo's mind before he could expose Superboy's cover. She was also able to erase or restore and alter the memory of others, reprogram other people's minds and put others to sleep or temporarily paralyze others.
- Mental detection: Megan can feel and detect the mind of others, as when she detect Psimon's presence or when she felt Superboy's pain.
- Multilingualism: Megan can speak Martian and English. She can also translate languages psychically.
- Psychic shield: Megan was able to generate "Mental shield" in her and other people's minds to prevent mental intrusions.
- Telekinesis: Megan has used telekinesis to move and manipulate many objects with her mind. However, she can lose control when moving too many objects at once or not paying enough attention  Miss Martian has shown the ability to generate telekinetic shields and shock-waves.
- Hand-to-hand combatant: Like all of the original members of the Team, she received hand to hand training from Black Canary. It came in useful during a fight with Cheshire while her powers were disabled by an inhibitor collar.
- Organic Clothing: M'gann wears organic clothing that can change size, shape and colour in response to her mental commands.
- Bio-Ship: M'gann's personal techno-organic ship used by the Team for transportation. While on standby, it resembles a giant egg. Once a Martian initializes it with a mental command, the Bio-Ship instantly morphs. The interior and exterior can be reconfigured to accommodate the situation, such as providing seats for extra passengers. The ship can activate a camouflage mode and become practically invisible.
- Heat: Miss Martian can be weakened when exposed to direct heat or fire.
- Inexperience: In her first year, Megan lacked the experience to properly control her extremely potent telepathic powers. She nearly killed her teammates with a routine telepathic training exercise.
- Extreme pressure: Miss Martian's physiology is susceptible to pressure. When she went to Atlantis, the underwater pressure caused her to shrink in size.
- Main article: Martian Manhunter
Miss Martian is one of Martian Manhunter's nieces. He has many hundreds of nephews and nieces, and had not met M'gann until June, when she stowed away on his ship. However, she claimed they shared a close familial bond.
Miss Martian became smitten with Superboy during the first time they met, evidently showing it by changing her shirt to match his. After several close encounters, they eventually became a couple.
The relationship became strained when Miss Martian started to use her telepathy to extract information from their enemies, leaving them in a catatonic state. The last straw came when Superboy confronted her with this information and she attempted to telepathically wipe the argument from his mind. Being so familiar with the feel of her telepathy however, allowed Superboy to catch her in the act. He was still angry at her whenever she used her powers like that, and was uncomfortable with seeing her with her new boyfriend, Lagoon Boy.
- Main article: Kid Flash
Kid Flash initially had a crush on Miss Martian. He frequently flirted with her and tried to impress her, although she had not shown much indication of returning his affection, and frequently seemed uncertain how to respond to his comments.
- Main article: Aqualad
Aqualad is Miss Martian's teammate and an earnest friend. Miss Martian looked up to him like an older brother.
- Main article: Artemis
When Artemis first joined the Team, Miss Martian was eager for a "sister" to bond with. The two both crushed on Superboy from the start, and Artemis's openness lead to some anger on M'gann's part but they soon settled the matter—though Artemis still tried to hook Miss Martian up with Aqualad to keep Superboy for herself. Artemis was at first unaware M'gann and Superboy were a couple, and was agitated when Zatanna clued her in.
After breaking up with Superboy, she began dating Lagoon Boy. They were honest about their relationship, showing it by kissing in front of everyone, unlike M'gann's previous and private relationship with Conner. Both felt comfort in each other. M'gann decided to end the relationship because he could never be anything more than a rebound guy for her, and she felt he deserved better.
- Main article: Beast Boy
After a blood transfusion saved his life when he was eight, Garfield Logan considered M'gann his blood-sister. Their bond became stronger after Marie's death, and they treat each other as brother and sister ever since.
- In the comics, while Miss Martian did somewhat attempt to hide the fact that she was a White Martian from her fellow Teen Titans, she never made the claim of being the Martian Manhunter's niece. This was a plot point introduced solely for Young Justice.
- Young Justice marks Miss Martian's first animated appearance.