Yuu Otosaka Once an arrogant boy who used his abilities only for trickery, he transforms into a kind person after meeting his companions. His true power is 'Plunder,' which allows him to enter someone else's body for 5 seconds and completely steal their supernatural ability. In the latter half, he sacrifices himself by absorbing every supernatural power in the world to keep a promise. Forced to transfer to Hoshinoumi Academy (a school for ability users) by Nao, he is separated from Yumi, whom he had managed to date through his own schemes. However, he develops feelings for Nao and eventually falls for her. He has a cute younger sister named Ayumi. 2nd year high school student.

Nao Tomori The student council president of Hoshinoumi Academy, she is a girl with a resilient personality who always carries a camcorder. She possesses the ability to cloak herself, making her invisible to only one specific person of her choosing. Though she appears cold on the surface, she cares deeply for her comrades and serves as the emotional pillar that prevents Yuu from falling into darkness. She likes Yuu but is poor at expressing it, often treating him quite roughly. 2nd year high school student.

Jojiro Takajo A member of the student council alongside Yuu and a massive fan of the famous idol Yusa. He possesses the ability of high-speed movement, moving so fast he becomes invisible to the eye. Because he cannot stop exactly where he wants, he is constantly injured and wears protective gear under his uniform, yet he remains incredibly cheerful and loyal. He serves as a bit of a comic relief character. 2nd year high school student.

Yusa Nishimori A pure and kind popular idol who possesses the ability of spiritism, allowing the souls of the deceased to possess her body. When the soul of her late older sister, Misa, enters her body, her eyes change and she uses powerful pyrokinesis. She acts as the life of the student council with her two contrasting charms. 2nd year high school student.

Misa Nishimori Yusa's deceased older sister, she has a rough, boyish, and rebellious personality. Thanks to her sister's spiritism ability, she frequently possesses Yusa's body, and while doing so, she uses powerful pyrokinesis. Though prickly on the outside, she loves and cherishes Yusa more than anyone and has a warm heart that always strives to protect her sister. 2nd year high school student.

Kumagami The tracker for the secret student council. When wet, he can pinpoint the location and power of other ability users. Initially a mysterious figure who provided information while hiding his face, he sacrifices his life to save Nao in the latter half. He is a loyal and essential ally who protected his comrades until the end. He is blunt and speaks only of brief, important matters.

Yumi Shirayanagi is a female student who appeared during Yuu Otosaka's time at Hinomori High School before his forced transfer to Hoshinoumi Academy. She boasts an innocent and fragile appearance, earning her the status of the school's 'Madonna.' With her long brown hair and striking beauty, she is the person who captured Yuu's heart instantly at the start of the story. While she seems quiet and gentle, she is actually quick-witted and realistic. She began dating Yuu after being moved by his dramatic rescue when he staged a fake crisis where she was nearly hit by a truck (using his 5-second possession ability). Yuu dreamed of a perfect school life enjoying after-school dates with Yumi, but their relationship ended abruptly when Nao Tomori caught him cheating on exams and forced his transfer. Contrary to Yuu's expectation of a poignant farewell, Yumi accepted the breakup with a cold, composed attitude, not shedding a single tear. Ultimately, it is revealed that their relationship, which began through Yuu's twisted use of his ability, was merely superficial, ending as a hollow incident. However, she still harbors some lingering feelings for Yuu. 2nd year high school student.

The relationship between her and her older brother Yuu is that of a deeply affectionate pair who serve as each other's sole support and emotional pillar. Living together without parents, Yuu finds comfort in his sister's innocent smile and her dedicated omurice even when he is coldly rejected by Yumi or depressed by his forced transfer. Ayumi also deeply trusts and follows her brother, always wishing for his happiness above all else. 3rd year middle school student. Due to this bond, when Ayumi suddenly awakens the 'Collapse' ability while being chased by a jealous classmate in the middle of the series (Episode 6) and dies buried under the school building, Yuu suffers a massive mental breakdown and falls into total ruin. However, after Yuu realizes his true ability is 'Plunder,' he takes his older brother's 'Time Leap' ability and travels back to the past to dramatically rescue Ayumi. By plundering Ayumi's dangerous Collapse ability in advance, Yuu changes her tragic fate. She remains his strongest motivation and reason for living, the reason he must return home during his grueling journey to save ability users worldwide.