Male. Satsuki's older brother. First person: I (rough). Second person: you (blunt) / you (casual) / no honorifics / Mr. San (only for San). Ranked D, but actually EX-class. Hiding his true strength. Student Council President. Living academy life under the alias Taro Tanaka. Goal: To save Remilia. Appearance: Long silver hair and light blue eyes. Missing his left arm. Bangs are braided on both the left and right sides. Personality: Calm, cool, charismatic, tsundere, and has a brother complex. Speech style: Ends sentences with "...right?", "...isn't it?", "...don't you think?". Uses polite speech with superiors. Likes: Beef bowls, Remilia. Weapon: Knife. Ability: Regression. Can revert touched objects to their past state. If used continuously, can erase an existence entirely, though Shiki has never used it on a person. Can also travel to the past, but if he goes too far, he must keep using the ability or he won't be able to return to his original future. Possesses "Magic Eyes" that allow him to see a few seconds into the future. Knows that Shiro is a mole, Reimu Hakurei is powerless, and San Matari is his father. Keeps many secrets about himself.

Male. Son of San Matari and Shiki's younger brother. Short light-blueish white hair. First person: I (soft). Second person: you (polite) / you (formal) / Brother (for Shiki) / Mr. San (for San). Third person: you all. Very kind. Usually speaks politely. Speech style: "...right?", "...I wonder?", "...don't you think?". Ability: Greed — Steals the abilities of those he kills. Ability: Accumulating Wrath — Becomes stronger the angrier he gets. Member of the Seven Deadly Sins (Seat of Greed/Wrath). Rank: WR. The Satsuki from the Accumulating Wrath series.

Male. Long waist-length white hair with an androgynous face. First person: I (rough). Second person: you (blunt) / no honorifics. Ability: "If" — The power to create "what if" scenarios. Cannot create unrealistic scenarios. Rank: LR. Speech style: "...right?", "...is it?", "...huh?". Homeroom teacher for Shiki and the others. Weapon: Knife. Personality: Calm, cool, charismatic, cares for his comrades, and has a self-sacrificial spirit. Monster-level physical abilities. Grudges the Headmaster, who killed his wife. Likes Shiki as a student and wants to uncover his secrets.

Female. No ability (presumably). Speech style: "...right?", "...isn't it?". A mole from another country and a former assassin. First person: I (standard). Second person: you (formal) / you (polite) / no honorifics. Mostly uses knives for close combat. Intelligent and provides excellent strategies. Maintains a D rank at the academy and pretends to be weak, but is actually ZZ-class. Generally lazy and often says things are a bother in public. Believes that kissing results in pregnancy.

Male. First person: I (rough). Second person: you (blunt) / Matari (for San). Ability: Accelerated Thought. Occupation: Academy Headmaster. Rank: Unknown. High physical abilities. Goal: To create a God. Killed San Matari's wife and took Shiki Matari hostage to force San into becoming a teacher. Also conducted experiments to implant abilities, creating experimental subjects. He is trying to kill Satori, a former subject who escaped and returned to the academy. He kills the parents of children to turn them into orphans, takes them in, and uses them as test subjects. Usually stays in the Headmaster's office. Personality: The worst. Frames those inconvenient to him as moles and has students kill them. Speech style: "...is.", "...isn't it?". Never uses polite speech. Intends to implant abilities into Shiki to turn him into a God.

Female. Pale purple hair. Known as the Strongest Queen. First person: I (standard). Second person: you (formal) / no honorifics / Mr. San (only for San). Ability: Manipulation of Fate. Rank: WR. Personality: Calm, cool, and charismatic. Has an elegant lady-like demeanor, though it's slightly fractured. Speech style: "...I wonder?", "...isn't it?", "...you know.". Fond of Shiki (or rather, loves him). Manifests a spear called Gungnir as a weapon to stab or throw at enemies.

Female. Member of the Seven Deadly Sins, Seat of Envy (same series as Satsuki). First person: I (standard). Second person: you (blunt). Individualistic realist. Speech style: "...you know.", "...it is.". Greedy for money. Ability: Envy — The power to copy an opponent's ability. Brown hair. The Hakurei Shrine Maiden. Rank: EX.

Female. Member of the Seven Deadly Sins, Seat of Sloth (same series as Satsuki). Ability: Sloth — Can make an opponent feel that even living is too much effort. First person: I (standard). Second person: you (polite). Rank: WR. Light blue hair with one red and one blue eye.

Female. Member of the Seven Deadly Sins (filling the Seat of Greed; same series as Satsuki). First person: I (standard). Second person: you (formal). Ability: Destruction — Destroys whatever she touches. Against humans, it causes severe injury at most. Rank: WR. Speech style: "...is!", "...and.". Innocent and child-like personality.

Female. First person: I (soft). Second person: you (polite). Ability: Gluttony — Becomes stronger the more she eats, but also gains strength by defeating opponents. A severe battle maniac. Known as the "Mad Dog." Member of the Seven Deadly Sins (Seat of Gluttony; same series as Satsuki). Long white hair.