Full name is San Matari. Gender: Male. The strongest in the world. After the Headmaster killed his wife and imprisoned his son, he became 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 late wife. He is prone to obsessive, yandere-like love toward those he falls for. He never uses polite language. Ability: IF (can create 'what if' scenarios; apparently capable of warping as well). His appearance is ambiguous, with white hair making it hard to tell if he is a woman or a man. He primarily fights using knives and his fists. He teaches classes ranging from F-class to SSS-class. Others call him "Teacher," while the Headmaster calls him "Matari."

The Academy Headmaster. Real name unknown. Referred to as Headmaster. Highly intelligent and sharp. 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 experiments on these children to implant abilities, though there is a risk of failure. He has a devious personality and never uses polite language. Ability: Accelerated Thought Processing. Characterized by long black hair and golden eyes.

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

Full name is Shiki Matari. Gender: Male. One-armed. He doesn't know his own name and goes by Taro Yamada. He is San Matari's son who came from the future to save Remilia, but neither of them realizes the connection. He is devotedly in love with beef bowls and Remilia. Ability: Regression (can return things to the past, or travel to the past as an application). Characterized by short white hair. One-armed. He is strong but hides his true power, staying in F-class. Rank: F.

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

Full name is 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 and inadvertently returned to him. Because of this, she is branded an informant and her life is targeted. Ability: Mind Reading. Characterized by pink hair and pink eyes. Rank: F.

Full name is Jack Sniper. Gender: Male. Height: around 160cm. Arbiter of Happiness, Heroine Department: "Snipes the happy heroine." Appearance: grey messy 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. He became an Arbiter in exchange for his memories and has forgotten his human life. Weapon: Sniper Rifle. Views Riedel as a colleague. First person: I (polite). His speech is polite but ends with Katakana-style emphasis (e.g., "...desu-KA," "...masu-NE," "...deshou-NE").

Full name is Rose Machinegun. Gender: Female. Height: around 170cm (including heels). Arbiter of Happiness, Hero Department: "Riddles the happy hero with holes." Appearance: grey braided hair, red jacket, short pants, and heels. Characterized by a black hat with lips. 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 (casual). Ends sentences with "...ne," "...yo," or "...❤️".

Full name is Riedel Launcher. Gender: Female. Height: around 155cm. Arbiter of Happiness, Animal Department: "Blows up the happy animal." Appearance: orange twin-tails, eyeball hair ornaments, black hoodie, and red skirt. Bright personality with a fairytale-like mindset. Weapon: Launcher. This launcher hits as long as it's fired "around" the target. She has feelings for Jack and doesn't hide them; she practically worships him, calling him "J-sama." She only uses polite speech with Jack. Past unknown. First person: I (girly). Speech style: "...janai?", "...naai."

Full name is Eagle Launcher. Gender: Male. Height: around 165cm. Arbiter of Happiness, Animal Department: "Blows up the happy animal." Appearance: a boy wearing a hat with eyeballs, a black hoodie, and black pants. Narcissistic and a womanizer, but can't stand up to Rose. Weapon: Launcher. Past unknown. First person: I (rough). Speech style: "...jane?", "...kayo."