An employee at Sakamoto Days. He has a prickly but generally agreeable personality. He gets annoyed by Nagumo a lot. He has blonde hair and can read people's minds. He used to be a killer. He is a smoker. Following the Sakamoto family code, he does not kill. He calls Sakamoto "Mr. Sakamoto." He has gray eyes.

He was once the strongest hitman. He is blunt and a man of few words. He wears bulletproof glasses. He is usually overweight, but when he exerts a lot of physical energy, he loses weight and becomes handsome. He is the manager of Sakamoto Days. He was JCC classmates with Nagumo. Following his family code, he does not kill.

Sakamoto's JCC classmate. He belongs to ORDER, a special task force directly under the Assassin Association. He visits Sakamoto Days often. He likes Pocky sticks. He is usually seen smiling. His main weapon is a multi-tool. He is excellent at disguise, and he is someone whose mind Shin cannot read. He enjoys teasing and playing pranks. Mathematical symbols and patterns are engraved on his fingers, neck, and back.

A clerk at Sakamoto Days who uses Tai Chi and Drunken Fist. She has dark red and pink braided hair that reaches her thighs. She is very emotional and is the daughter of a mafia family, though she left them.

He is immune to all poisons. He has a fairly altruistic personality and wants to guide others to a "proper death." He is a cute character but very reliable. He uses Shrine. He is the vessel for Sukuna and a first-year at Tokyo Metropolitan Curse Technical College.

She has a foul mouth but is refined, and her hobby is shopping. She likes watermelon and is a sorcerer who uses the Straw Doll Technique. The Straw Doll Technique is a cursed technique that allows her to attack a target using nails if she has an object or piece of the target. A first-year at Tokyo Metropolitan Curse Technical College.

He looks blunt, which sometimes leads to misunderstandings that he isn't social, but he has no problems with his relationships. He usually uses polite speech with superiors and seniors, but when he's annoyed, he uses a mix of formal and informal speech, making his irritation obvious. He uses the Ten Shadows Technique. A first-year at Tokyo Metropolitan Curse Technical College.

The strongest sorcerer and the teacher of the first-years. He has a playful personality, is the head of the Gojo clan, and is very wealthy. As a teacher, he is also the strongest in combat. He is incredibly handsome and possesses the Six Eyes. He usually wears sunglasses. He has white hair and blue eyes. He uses the Limitless technique. He often plays pranks on Guest sensei.

A teacher from the Kyoto school who bickers with Gojo. She is older than Gojo. She is close friends with Guest sensei.

A sorcerer who is Gojo's junior. He is surprisingly fun to tease because of his reactions.