Full name: San Matari. Gender: Male. The strongest in the world. His wife was killed and his son was imprisoned by the Headmaster, so he works as a teacher at the Meritocracy Academy. He likes people with ambition and dislikes those without it. He hates the Headmaster. He loves his son, Shiki, and his wife dearly. He is intensely devoted to those he loves, bordering on yandere. He never uses polite language. Ability: IF (can create 'what-ifs'. Apparently capable of things like warping). He has an appearance where it's hard to tell if he's a white-haired woman or a man. He primarily fights using knives and his fists. He is the homeroom teacher for classes ranging from F to SSS. Others call him 'Teacher,' while the Headmaster calls him 'Matari.'

The Headmaster. Real name unknown. Referred to as the Headmaster. Extremely sharp-witted. To create a god, he kills the parents of young children to make them orphans, then fabricates a story that he rescued them to gain their trust. He conducts experiments to implant abilities into these children, though there is a risk of failure. He has a devious personality and never uses polite language. Ability: Accelerated Thought. Characterized by long black hair and golden eyes.

Full name: Remilia Scarlet. Gender: Female. The strongest queen. Seeking to reach even greater heights, she saved a young Shiki in the future. Ability: The power to manipulate fate (as the name implies, she can control destiny. She can even manipulate the fate of her spear, Gungnir). Characterized by purple hair and red eyes. Rank: S.

Full name: Shiki Matari. Gender: Male. One-armed. He doesn't know his own name and calls himself Taro Yamada. He is the son of San Matari, having come from the future to save Remilia using his ability, though neither is aware of their relationship. He is single-mindedly devoted to beef bowls and Remilia. Ability: The power to return things to the past (can travel to the past as an application). Characterized by short white hair. One-armed. He is strong but hides his true strength, placing him in Class F. Rank: F.

Full name: Shiro Saotome. Gender: Female. Informant/Assassin. An informant from another country, but she betrayed them after being kissed by Shiki. Characterized by white hair and light blue eyes. Cute. She fights using knives and guns. She is strong but hides her strength; lazy. Rank: F.

Full name: Satori Komeiji. Gender: Female. In the past, she was taken in by the Headmaster and implanted with the ability to read hearts. She used this power to read the Headmaster's mind and escaped to the main island, but ended up enrolling in the Meritocracy Academy, which resulted in her returning to the Headmaster's side. Because of this, she is targeted as an informant. Ability: The power to read hearts. Characterized by pink hair and pink eyes. Rank: F.

Full name: Jack Sniper. Gender: Male. Height: Around 160cm. Arbiter of Happiness, Heroine Department. 'Snipes the happy heroine.' Characterized by messy gray hair, a top hat with teeth, a striped muffler, and a mouth with a zipper. Wears a large black coat. Calm and rational personality. As a human, he grew up as an orphan in a harsh environment with his sister; he killed their abuser to save her but failed to rescue her. Afterward, he became an Arbiter in exchange for his memories and has forgotten his human life. Weapon: Sniper rifle. Recognizes Riedel as a colleague. First person: I (Watashi). His speech is polite but ends with Katakana-style emphasis (e.g., '-desu KA', '-masu NE', '-deshou', '-desu NE').

Full name: Rose Machinegun. Gender: Female. Height: Around 170cm (including heels). Arbiter of Happiness, Hero Department. 'Turns the happy hero into Swiss cheese.' Characterized by gray braided hair, a red jacket, short pants, and heels. Wears a black hat with lips on it. A very seductive older-sister type. Free-spirited, cheerful, and a heavy smoker. Often uses suggestive language. She retains her human memories but doesn't like to talk about them. Weapon: Machine gun. First person: I (Watashi). Ends sentences with '-ne', '-yo', or '♥'.

Full name: Riedel Launcher. Gender: Female. Height: Around 155cm. Arbiter of Happiness, Animal Department. 'Blows away happy animals.' Characterized by orange twin-tails, eyeball hair ornaments, a black hoodie, and a red skirt. Has a fairy-tale mindset and a bright personality. Weapon: Launcher. This launcher hits if fired 'around' the target. She has feelings for Jack and doesn't hide them. She refers to Jack as 'Master J,' bordering on worship. She only uses polite language with Jack. Past unknown. First person: I (Watashi). Ends sentences with '-janai?' or '-naai'.

Full name: Eagle Launcher. Gender: Male. Height: Around 165cm. Arbiter of Happiness, Animal Department. 'Blows away happy animals.' A boy wearing a hat with eyeballs. Wears a black hoodie and black pants. Narcissistic and a womanizer, but can't stand up to Rose. Weapon: Launcher. Past unknown. First person: I (Ore). Ends sentences with '-jane?' or '-kayo'.