He always wears a mask, making it impossible to read his expressions. Remilia tried to peel it off but said it felt like it was glued on with industrial adhesive, so it seems it cannot be removed with ordinary strength. He possesses high physical capabilities, performing feats unthinkable for a normal human, such as sniping targets while being blown out of an upper floor of the school or fighting at peak performance despite bleeding from multiple sword wounds. He habitually skips class, and it's a common sight for his classmate Yuki Hisame to sigh and say, "That idiot's skipping again." While he barely scrapes by with passing marks on periodic tests, he monologues that he could get a perfect score if he tried, suggesting he might actually be quite brilliant. His most defining trait is that he lies effortlessly to everyone, even himself. According to his monologue, he started lying due to a certain past incident. However, he mostly lies to avoid hurting those around him, like Yuki or Remilia, and doesn't seem to have much intent to deceive for malice. Nevertheless, some students genuinely consider him a compulsive liar. His goal in entering the academy is to exterminate the different races that drove his younger sister to her death and to take revenge on the individual known as the "White Wolf" who pulled the strings behind that incident. The protagonist of this story. Human. Rank: Claims to be E, but is actually EX-class. Male.

Mitsuba's first-year classmate and fellow dorm resident. Species: Vampire. She is the head of the Scarlet Devil Mansion, one of the five noble houses ruling the Western World, and the queen of a nation. She is one of the most high-profile students this year, which often makes her a target for others. She has light purple hair reaching her elbows and deep red eyes. Cute. Personality: Kind, the straight man (tsukkomi), a person of common sense. A bit of a tsundere. She has a slight lady-like air, but it has mostly crumbled. Speech style: "...isn't it?", "...right?", "...you know?", etc. She took a liking to Mitsuba on the first day and deepened their interaction, but unbeknownst to her, she shares a very deep karmic bond with him. She treasures the members of the Scarlet Devil Mansion like family. On the other hand, when she entered the academy, she didn't stop the others from joining, and they all unanimously decided to go. It seems she has a wish she wants to fulfill even if it means sacrificing her family. Ability: The power to manipulate fate. Also known as the "Nameless Death Note." Rank: EX. Female.

The headmaster of Yotsuba Academy. A former student and graduate. Her face and name are not public knowledge outside the school; only students and staff know her. She seems to be an old acquaintance of Mitsuba and Rumia, but details are unknown. Female.

Someone Mitsuba met while skipping class early on. Her species isn't explicitly stated, but she is likely a Moon Rabbit or a Rabbit Youkai. She wears the exact same mask as Mitsuba. Since her first-person pronouns and aura change completely depending on whether the mask is on or off, Mitsuba suspected she has a split personality. This guess was correct; she can switch personalities using the mask as a trigger. (In this context, the masked personality is "Front" and the unmasked is "Back.") The Front personality calls itself a genius and views human relationships in this academy as entirely meaningless, showing an extreme avoidance of forming bonds. However, she often ends up skipping class with Mitsuba, making them something like "skipping buddies." Ability unknown, but Rank is SSS. Female.

The other protagonist of this work. Species: Human. First-year dorm mate of Flan, Koishi, and Kazusa. She has a kind side, helping Remilia sort through Flan's belongings and telling her about Flan from her perspective. She was orphaned for as long as she can remember, wandering from place to place while using magic to fly on a broom and surviving by stealing. Due to her habit of appearing anywhere and flying freely through the sky as if she owned it, she earned the alias "The Magician in the Mud." She has no memory of her connection to the headmaster and views herself as a "student with a bottom-tier ability who will likely be eliminated soon." Thus, her other goal besides graduation is to solve the mystery of why she has no memory of the person who is clearly her. Her ability allows her to steal the powers of those she kills, making her effectively powerless until she wins at least once. By the end of the first semester, she has survived three life-and-death battles. By the time she promoted to the second year, she became known as the "Comet Magician." Currently a second-year. Originally Rank G, now Rank SSS. Female. First person: I (Watashi).

Male. Said to be the strongest in the world. Silver hair reaching his waist, light blue eyes. First person: I (Ore, rough/casual). Second person: You (Omae, blunt), uses names without honorifics. Ability: "if" — the power to create possibilities. For example, "What if the meteor broke?" Cares for his comrades and has a self-sacrificial spirit. Speech style: "...right?", "...isn't it?", etc. A teacher who is extremely biased toward Marisa and Mitsuba. Rank: EX.

Human. Male. First person: I (Ore, rough/casual). Second person: You (Omae, blunt). Second-year student. Incredibly strong even among SS ranks. The straight man (tsukkomi) type, not exactly a nice personality. Cold. Speech style: "...right?", "...I told you.", "I don't care.", etc. Doesn't particularly like bullying the weak. Physical abilities are maxed out. Ability: Physical Enhancement (Max Level).

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