Tatsumaki/Synopsis

History
Tatsumaki's psychic abilities eventually led to her being taken away from her adopted family at the age of seven by a group of scientists called Tsukuyomi, who were interested in studying her powers. Her parents were given money for complying. She was tested on by the scientists because of her extraordinary powers. They rewarded her with candy and toys for cooperation, but denied her requests to go outside. Moreover, the scientists locked her up in a cell whenever she wouldn't use her powers. 18 years ago, when she was 10, a monster outbreak occurred while she was still locked in a cell, leaving her alone to fend off the monster.

Luckily, Blast managed to come to Tatsumaki's rescue. He then introduced himself to the young esper and questioned her on why she didn't use her psychic powers to save herself. Tatsumaki answered that her powers weren't working, but Blast realized that she was lying because she held it back so that the scientists would deem her useless and let her go. Tatsumaki admitted this, due to being heartbroken by her parents for selling her out. Blast also somehow realized that Tatsumaki still had her little sister, giving her advice not to expect anyone to save her next time, and be strong to protect her only family.

An unknown number of years before the events of the main story, Tatsumaki saved Fubuki from bullies at their school, launching a kid who tried jumping on her into the air. The rest of the kids ran into the school building, but Tatsumaki retaliated by momentarily lifting the entire building into the air. She then told Fubuki to either come to her or retaliate when she was being bullied.

After a while, she encountered and battled Otento and held a grudge against him until today.

Rumored Monster Arc
Tatsumaki visits the Z-City branch of the Hero Association to see if she can investigate the restricted area of Z-City. However, she is informed by Busho that she didn't need to come, since the Association thought that an S-Class wasn't necessary for the job. She leaves, calling Busho an idiot. Later, after both Golden Ball and Spring Mustachio return badly injured, Tatsumaki is enraged and yells at the worker saying she should have gone. The worker shows her a picture of the destruction, saying even she might have had a hard time. Tatsumaki tells him she could handle it then calls him an idiot again.

Alien Conquerors Arc
Tatsumaki is sent to the mountains by plane to fight the Ancient King, only to be called back to the Hero Association HQ by cellphone, which angers her greatly. She quickly ends the fight by sending a meteor crashing down on the Ancient King.

Tatsumaki later meets Saitama at the Hero Association HQ due to Bang inviting him to the Hero Association S-Class meeting. She becomes indignant at his presence, asking who let Saitama in, pointing out that he is a lower-ranked hero, and accusing him of only coming to the meeting to see the S-Class heroes up close. A perplexed Saitama mistakes her for a child and asks if she is lost, prompting Genos to explain her identity. Genos observes that most of the S-Class heroes have arrived and goes to take his seat, causing Saitama to ignore her, much to her chagrin. Upon the meeting's inception, Bang asks what the heroes were called to the meeting for, to which Tatsumaki states that she had to wait for two hours without hearing an explanation.

During the alien invasion of A-City, Tatsumaki prepares to set out to engage with the enemy and their aircraft. Because of King's moniker of "The Strongest Man on Earth", fellow S-Class hero Superalloy Darkshine asks for King's opinion on how to deal with the spaceship, but King states that they can't do anything due to the ship being too far away. Tatsumaki deems this answer pathetic and decides to take down the spaceship alone, rudely declining Genos's offer to assist.

At the site of the heroes' engagement with Melzargard, the aircraft of the Dark Matter Thieves fires cannons towards the ground in an attempt to eliminate Bang, Atomic Samurai, Metal Bat and Puri-Puri Prisoner, only to be intercepted by Tatsumaki, who redirects them back at the aircraft. In the midst of the battle, Tanktop Master attempts to help her by throwing concrete blocks at the enemy, until he realized that Tatsumaki's psychic ability can do more than Tanktop Master could ever accomplish on his own.

The spaceship eventually falls, though she is not convinced it is because of her doing. After the fight is over, Saitama bursts out from the wreckage, and is asked by Tatsumaki if he came on his own. He ignores her and starts a conversation with Genos. Angered by being ignored, she starts insulting Saitama and slams Genos against a wall after he addresses her as a brat in retaliation. Bang stops her when she is about to attack Saitama, telling her to act properly as an S-Class hero.

The Blizzard Group Arc
Tatsumaki makes a brief appearance in Fubuki's vision.

Monster Raid Arc
Tatsumaki causes an explosion in the city where Do-S and Fubuki are fighting. When she arrives, Tatsumaki immediately tells Fubuki to go home and that she will handle the rest. Do-S orders her love slaves to attack Tatsumaki as a distraction as she escapes. Tatsumaki immobilizes all of the love slaves and tells Fubuki that they will only get in her way and to not call them her allies. Tatsumaki then takes off to find the rest of the monsters.

Super Fight Arc
She later appears arriving in I-City, killing a wounded Hundred-Eyes Octopus, much to the chagrin of Flashy Flash. She berates the heroes and then leaves as Flashy Flash tries to argue with her.

Tatsumaki is one of heroes seen fighting against monsters, when Suiryu is calling for help.

Monster Association Arc
Tatsumaki is summoned by the Hero Association to attend a meeting to prepare for the Monster Association raid operation. With her usual superiority complex, she brags that the Monster Association is just a bunch of cowards and if they were not, they would not be a match for her. When she is briefed about the situation by Sekingar, she suggests reducing Z-City to rubble to kill all the monsters while disregarding the life of the hostage.

The S-Class heroes, Tatsumaki, Child Emperor, Atomic Samurai, Pig God, Flashy Flash, Superalloy Darkshine, Zombieman, Puri-Puri Prisoner and Sekingar attend a meeting and they reassure Narinki that they will rescue his son. They each receive a transmitter that will show their location to each other. She gets into an argument with Sweet Mask on who wants to lead the strike force. Ultimately, the situation is calmed by King who arrives from Z-City.

The Hero Association strike team heads out to Z-City to confront the Monster Association. At the Z-City Ghost Town, the battle begins as Tatsumaki fights Evil Eye. She kills the monster, twisting it into oblivion.

Tatsumaki then heads into the Monster Association Headquarters at her assigned route. Tatsumaki is later seen challenging Gyoro Gyoro. Gyoro Gyoro underestimates her power, and Tatsumaki manages to quickly gain the upper hand in their fight. Gyoro Gyoro quickly starts calling Orochi for help, but to no avail. When Tatsumaki hears Orochi was killed by a "bald dude", she wonders if it was Darkshine.

After defeating Gyoro Gyoro, Tatsumaki tears a humanoid figure out of its body and realizes that Gyoro Gyoro is really Fubuki's friend turned enemy, Psykos. Tatsumaki quickly realizes that the humanoid inside Gyoro Gyoro is nothing more than another meat puppet, and that Psykos's actual body is located deep underground. She quickly locates Psykos and pulls her up in spite of the latter's attempted resistance. After momentarily questioning Psykos on Tareo's whereabouts, the two clash, and Tatsumaki easily restrains Psykos and interrogates her for intelligence. After receiving the requisite intel, Tatsumaki briefly argues with Sweet Mask via transmitter, refusing to help the idol hero against an executive member, but is cut off by Orochi, who reappears and attacks her.

As Tatsumaki fights Orochi, she wonders if he's a cadre and expresses frustration at the inability of the other heroes to rescue Tareo, stating it would be easier if she could just destroy the base. When Psykos forces Orochi to merge with her, Tatsumaki continues fighting, but quickly realizes that Psykos's psychic power has increased substantially. She sustains moderate injuries in her struggle to hold Psykos and Orochi off, but receives word from King of Tareo's safety. Tatsumaki declares that she no longer needs to hold back and begins to unleash her full power.

Using the location of the transponders, Tatsumaki encloses the underground heroes in psychic barriers and lifts them up to the surface, with the exceptions of Zombieman, Flashy Flash, and Saitama, who do not have transponders on them. After ensuring their safety, she pulls the Monster Association base aboveground, flying out of a building moments before the fusion between Psykos and Orochi emerges.

Tatsumaki notices that Psykos is absorbing energy from the tendrils on her and Orochi's lower body. She attempts to drill through her now that they're outside, but is shocked when Psykos unleashes a beam of incredible destructive power, momentarily cutting off a sliver of the planet. Tatsumaki wonders where Psykos's power is coming from, and when told of Psykos's plan to absorb every life form, deems it stupid and mocks her. When Psykos attacks, Tatsumaki flies between the energy beams of her dragons, staying high above the surface as to keep the line of fire away from the ground.

Tatsumaki notices King leading Tareo away from the battle and mentally praises him for leaving the battle to her. She then lifts several large rocks out of the ocean and hurls them at Psykos, attempting to trap her. Psykos breaks out, and a whirlwind of rocks and energy fills the sky as the two unleash their power. However, Tatsumaki then decides to create a dummy using rocks and imbue it with her esper power to distract Psykos amidst the rocks flying everywhere. While Psykos attacks the dummy, Tatsumaki flies to the bottom of the uprooted Monster Association base and enters one of the tendrils of Psykos and Orochi's root system, muting her psychic signature as to not be detected. She then flies up to Psykos's main body, commenting on how hollow it is from the inside, and quickly destroys it by twisting it. Tatsumaki then decides it's time to pull out the infiltration squad, extricating Atomic Samurai and Puri-Puri Prisoner from the building.

However, before she can finish the job, both her hands are impaled by the blades of Psykos and Orochi's quickly-reforming body, and she is hit with a powerful jolt of psychic power. Psykos charges up another powerful energy beam, but Tatsumaki is saved by Genos, who launches an energy beam of his own to intercept. As Genos takes on Psykos and Orochi, Tatsumaki angrily tells him to get out of the way, stating that King left her this responsibility. Genos responds that King only left her the job until Saitama's arrival, adding that it's the disciple's duty to help with the teacher's work. He then tells her to attack Psykos and Orochi's body while he handles her energy beams, and the two heroes begin their battle against the monster.

Psykos attempts to attack Tatsumaki with another energy beam, but Genos counters it with beams of his own and tells Tatsumaki to hurry up and rescue everyone else. She does so, pulling out Child Emperor, Sweet Mask, Superalloy Darkshine, Fubuki, Bang, and Bomb. Psykos attempts to finish off a now weakened Genos, but Tatsumaki blocks the energy beam and tells Genos he did a good job, although he rudely responds that he didn't do what he did for her. Tatsumaki then restrains Psykos and twists the entire city in an attempt to fully destroy Psykos's monster form. Suddenly, blood spurts from Tatsumaki's nose and her psychic power begins to fluctuate due to her overusing it. Psykos transforms Orochi's remaining form into a jet and flies away, simultaneously releasing a smokescreen and creating a number of decoys. Tatsumaki counters this by creating a large barrier around the battleground, preventing Psykos from escaping. Psykos attempts to fire an energy beam through Tatsumaki's heart, but realizes too late that she attacked a decoy. Upon finding Psykos, Tatsumaki prepares to fight, but their battle is interrupted again, this time by Drive Knight, who has transformed himself into a fighter jet.

While Drive Knight and Genos protect an unconscious Tatsumaki from Psykos, she has a flashback to when Blast rescued her 18 years ago, remembering Blast's advice to not expect anyone else to save her. She wakes up to Fubuki sending her a telepathic message that she and the S-Class are coming to rescue her. Tatsumaki says to not underestimate her and locks on to Psykos and Drive Knight's signal coming from inside a tunnel. She collapses the ceiling in an attempt to impede Psykos, but this is ineffective as Psykos quickly transforms her jet to maneuver around the debris.

After shaking off Genos and Drive Knight's attacks, Psykos proceeds to fire an energy beam in a final attempt to eliminate Tatsumaki, but the beam is intercepted by a massive boulder thrown by Tanktop Master. As the remaining S-Class heroes attack, Tatsumaki prepares to finish off Orochi, pulling a rock formation in the shape of a spear out of the ground. She charges up the spear with psychic energy and launches it at Orochi while spinning it rapidly, shredding the monster to pieces. After finishing Orochi, Tatsumaki's barrier vanishes, and Blast seemingly appears beside her from a portal.

Tatsumaki is then attacked by Homeless Emperor, who creates and sends countless energy spheres after her. In the stream of lights, she manages to create a decoy and swap it with her before being seemingly cornered and defeated. Tatsumaki then appears in front of Bang, Bomb, Fubuki and Genos, in an exhausted and weakened state. She sees Fubuki's injuries, and becomes enraged at believing that Child Emperor and Sekingar let her sister participate in battle despite telling them not to before, and proceeds to angrily ask Fubuki who had made her suffer. Fubuki, however, replies to her that it was Fubuki's own doing, with Tatsumaki calming down and telling her to leave. As Fubuki tries to stop her from returning to fight, Tatsumaki psychically pushes her back. Despite Tatsumaki disregarding her, Fubuki still wants to save her big sister, reasoning that Fubuki herself is also a hero, while attempting to restrict Tatsumaki's movements using telekinesis. Tatsumaki instantly frees herself from Fubuki's hold on her and binds her along with Bang and Bomb using the same psychic technique. Before leaving, she responds to Fubuki that while she is happy that Fubuki has indeed grown, she cannot afford to think that she will be saved by anyone, leaving Fubuki in tears.

Tatsumaki soon arrives where Pig God and Tanktop Master are at, and manages to stop Fuhrer Ugly from killing one of the members of Narinki's Private Squad. This buys the other two heroes time to save all the mercenaries, Bushidrill and Okamaitachi. However, due to Tatsumaki having been heavily injured and in a weakened state, she is unable to hold back Fuhrer Ugly any longer as the latter escapes her bind and knocks her back to a nearby rock, where the monster then walks up to her after defeating Tanktop Master. Before Fuhrer Ugly can get his hands on Tatsumaki, however, Bang and Genos arrive, with the former distracting the ugly monster by attacking Gums, saving Tanktop Master from the gluttony monster and causing Fuhrer Ugly to switch his focus on the martial artist.

Genos quickly carries Tatsumaki to her sister's whereabouts, hoping Fubuki will heal her injuries. While carrying Tatsumaki and Tanktop Master to Fubuki, Bang and Genos are blocked and attacked by Black Sperm, who replicates himself into many clones to corner them. Atomic Samurai then comes to their aid and allows them to take Tatsumaki and Tanktop Master to safety. As a group of many clones are still chasing them, Tatsumaki regains her consciousness and helps Bang fend off the monster so that Genos can escape with Tanktop Master.

Later, with some other heroes and the Council of Swordmasters having come to assist, Tatsumaki, together with them, fends off countless copies of Black Sperm. During the battle, a massive Black Sperm bursts out of the ground and catches her, attempting to crush her. However, Genos, who has just returned after transferring Tanktop Master to Fubuki, manages to save her by incinerating the clone. Several more clones form up behind Genos and slam him into the ground, but the cyborg immediately makes use of his suit's burial escape functionality to get back on his feet, telling Tatsumaki that it uses the data from when he fought her. She teases Genos, saying that it was thanks to her he has become stronger, much to his annoyance. Together, they prepare to face off against Black Sperm.

Unfortunately, due to Tatsumaki's exhaustion and Genos not having the capability to fight off so many clones of Black Sperm at once, they are overwhelmed by the monster, with the cyborg having all of his limbs torn off. Despite Tatsumaki telling him to leave and run away, Genos still desperately tries to protect her, shielding her with his own damaged body and refusing to resort to self-destruction as to not risk her life. As she and Genos are surrounded by the black monster and in a life-and-death situation, King appears in front of them with his King Engine running, prompting Black Sperm to stop in his tracks.

As King provides a distraction, Tatsumaki and Genos are saved and Tatsumaki is brought to safety by Puri-Puri Prisoner. Tatsumaki then wakes up to see Blast standing in front of her. However, she manages to see through the illusion, right before the real Blast arrives to her side. After seeing how much Tatsumaki has grown, Blast quickly disappears and leaves Tatsumaki in King's hands. As King carries an unconscious Tatsumaki, he is greeted by Fubuki and Tanktop Master, who are carrying multiple wounded. Fubuki rushes to Tatsumaki's side, attempting to heal her with her psychic powers. However they are interrupted by massive waves caused by the action. Everybody then gets swallowed up and taken to safety by Pig God.

Psychic Sisters Arc
As Fubuki is attempting to prevent Apollo, a member of Tsukuyomi, from extracting Psykos from her prison in the Hero Association Headquarters, Tatsumaki destroys the ceiling and enters from the sky. She asks why Psykos is still alive and throws Apollo into the wall. Fubuki informs the nearby Hero Association workers that she will hold off Tatsumaki. Tatsumaki asks why she would protect a monster like Psykos, but it is revealed in a flashback that the sisters planned this at a dinner. Tatsumaki does not trust Tsukuyomi because it is the organization that imprisoned and experimented on her as a child, so she asks Fubuki to assist her in putting on an act to protect Psykos. The fight between Tatsumaki and Apollo shakes the whole Hero Association above them, which terrifies its residents. Apollo acknowledges Tatsumaki's greater power but then activates a capsule filled with deadly poison inside of Fubuki, which was placed in her daily supplements by a Tsukuyomi spy among Fubuki's allies, to force Tatsumaki to back down. Apollo twists Tatsumaki and attempts to fly away with her, Fubuki, and Psykos, but Tatsumaki locates the capsule, shapes it into a needle, and pulls it out Fubuki's body into Apollo's eye. She then traps him in a sphere of rock and lands safely with Fubuki and Psykos. Tatsumaki then yells at Fubuki's allies because they endangered her life by allowing a spy to infiltrate their ranks. She commands Fubuki to cut off ties with them because they make her weak, but their efforts to explain and affirm their commitment to Fubuki's safety only make her angrier. Tatsumaki prepares to injure them to the point where they can no longer be heroes, but Saitama arrives and grabs her wrist. She orders him to let go and tries to blast him away with psychokinesis, but it has no effect. His ability to endure her power confuses her and she recalls his status as a comrade of Genos upon Saitama voicing his thoughts about how she threw Genos earlier. Saitama yells to Fubuki and those near her to evacuate which makes Tatsumaki question why he is so familiar with her. However, Saitama states he is only an acquaintance of Fubuki's, which confuses Tatsumaki even more. Tatsumaki says she will test him to see if he is worthy of being around her sister and begins shaking the area and the building above them. Saitama gets mad at how careless Tatsumaki is regarding damaging houses so he pulls her to his chest and jumps out of the underground cell with her to prevent further damage. As they bounce on the ground outside, Tatsumaki calls Saitama a pervert for holding on to her and attempts to force him to let go by rapidly spinning him and throwing him into the ground. This fails and Tatsumaki asks him if he likes her because he won't let go, but Saitama says she will go back to Fubuki if he does. Tatsumaki is astonished that he thinks she will run away, so Saitama finally lets go. She tells him he's not too bad and flicks him away with psychic energy to test his endurance. She then manifests a tornado which Saitama thinks will be fun to deal with. Tatsumaki begins to throw giant rocks at Saitama using the momentum of the tornado, but one of them nearly hits a car. Saitama destroys the rock and yells at her to watch what she's doing, but debris from another rock that Saitama smacks away heads towards the same vehicle. Before Saitama can reach it, Tatsumaki prevents the debris from hitting the car and mockingly tells Saitama to watch where he's deflecting things. She then claims Saitama is too pathetic to be around Fubuki and tells him to stay away from her. Tatsumaki's powers destroy Saitama's jacket, eliciting a scream from him, and then she flicks him repeatedly into a nearby city. Saitama crashes into a building where the hero Feather confronts a gang, knocking the hero out. Saitama expresses concern for the injured and he and Tatsumaki blame each other for crashing into the building. However, the gang leader recognizes Tatsumaki and attempts to attack her but Saitama punches him through the ceiling after being struck by the criminal. The two then defeat the gangsters and fly across the city in which they blast through the monster Kenzan Rat, killing it. Tatsumaki throws Saitama through several buildings which Saitama scolds her for and demands her to stop and go back to where they started fighting. Tatsumaki agrees and stares him down, which surprises Saitama because of her lack of argument in the matter. However, Tatsumaki grabs his head and drags it through the concrete as they fly back to where they started. She notices someone chasing them which happens to be Speed-o'-Sound Sonic. He throws Homing Exploding Shuriken at them, but Tatsumaki redirects them at Sonic which prevents him from continuing.

Upon returning to where Saitama initially took her, Saitama escapes Tatsumaki's grasp and tells her it's fine to rampage for the moment. Tatsumaki is annoyed because he has been looking down on her, but Saitama assures her it's fine to go all out. Saitama eventually lands near King and tells him about his fight with a pipsqueak, which Tatsumaki hears. She lands near King as well but she follows after Saitama who jumps away. Tatsumaki begins to pant from exhaustion, but she admits she is having fun fighting someone on the same level as Blast. She tries to trap Saitama in the earth but he punches his way out, which shocks her again. Saitama expresses concern but Tatsumaki attempts to lift him into space. However, she can barely hold him in the air which tires her out more. Saitama explains he's not her enemy but she claims she doesn't want to be friendly with him. Saitama then tells her she takes human relationships too lightly just as she passes out. While unconscious, Tatsumaki recalls how she is responsible for dragging Fubuki to a harsh fate and pictures herself as a child again chasing after Blast. She admits to him that she doesn't want everyone to be afraid of her so she asks him what to do. She then wakes up next to Saitama who waited for her to recover. Saitama commends her because of how much she trained but she tells him she already knew that, which annoys him. Saitama then tells her she can live how she wants as long as she doesn't damage property as much. He tells her she will become a great hero if she can accomplish this and places his hand on her head, which she allows. Before Saitama can leave, Fubuki arrives and tells Tatsumaki she did as she asked by leaving her members behind. However, they appear behind her and beg Tatsumaki to let them serve Fubuki as they get stronger. Before Tatsumaki can attack them, Fubuki does instead and tells them they can never hope to confront Tatsumaki if they can't defeat her. Saitama and Tatsumaki watch, but Saitama eventually tells Tatsumaki to let them stay with Fubuki. Tatsumaki tries to tell him it's none of his business, but he reveals to her how he couldn't defeat a wolf-level monster before, which shocks her. He then says they may be weak now but no one knows what their limit is. Tatsumaki is convinced and lets Fubuki's comrades stay with her because of Saitama's request. However, she tells them she will never forgive them if they let Fubuki get hurt. Tatsumaki then tells Saitama their test isn't over so he should expect another surprise test from her, much to his annoyance. He then tells her to stop rampaging and leaves.

Neo Heroes Uprising Arc
Tatsumaki is later dispatched to P-City to take on the Dragon level mysterious being Aggregation. She expresses disgust and shock as the mass of insects splits and begins to attack. Ultimately, she beats the monster without suffering any injuries, but she notices that the monster managed to destroy the entire city and thinks to herself that humanity won't survive unless they take preventive measures against future disasters.

The next day, Tatsumaki is called to the Hero Association HQ, where they inform her of an sinister esper organization known as Eleven, led by a figure named Otento who is after Tatsumaki's life. Tatsumaki states that Otento's name is a sickening memory, and agrees to actively pursue Eleven, stating that she's already been looking for them.