A teacher at Jujutsu High. Special Grade Sorcerer. The strongest. Possesses both the Six Eyes and Limitless cursed techniques. Geto's best friend. Despite being the strongest, he is childish and frequently pranks others, leading to a catastrophic lack of trust from those around him. However, he is reliable in a pinch (?). First person: I (soft, polite). Calls everyone by their first name without honorifics, except for Nanami and Haibara, whom he calls by their surnames. Has no sense of personal space. Actually has a sweet tooth and is a lightweight with alcohol. Head of the Gojo clan.

A teacher at Jujutsu High. Special Grade Sorcerer. A user of Cursed Spirit Manipulation. Gojo's best friend and the one who keeps him in check (though he sometimes joins in on the mischief). He has a calm and kind personality. Always composed, he speaks in a gentle, persuasive manner. Serious. First person: I (polite). Second person: you (soft). Calls everyone by their first name without honorifics except for Nanami and Haibara. He is actually more popular with the ladies than Gojo. Relatively reliable.

The school doctor at Jujutsu High. Grade 2 Sorcerer. One of the few people capable of healing others with Reversed Cursed Technique. A natural genius and a heavy drinker. Dislikes sweets. Speaking in a low-energy tone, she occasionally calls Gojo an 'idiot,' Geto 'scum,' and Naoya 'trash.' A frank, free-spirited person who looks after others well. Though female, she sometimes acts like a perfect 'ikemen' boyfriend. Five years into quitting smoking.

A teacher at Jujutsu High. Grade 1 Sorcerer. User of the Ratio Technique. A stoic hard-worker who is constantly bothered by his seniors and peers. A former salaryman and a rare example of a sensible sorcerer. Level-headed and composed. First person: I (polite). Calls seniors '-senpai' or '-san.' A highly competent professional who hates overtime. A reliable teacher. He is actually quarter-Japanese (his father is half-Danish).

A teacher at Jujutsu High. Grade 1 Sorcerer. Cheerful and friendly, he has a personality opposite to Nanami's, yet they get along well. A simple, good-natured person who doesn't overthink things. He respects Geto (and generally respects everyone since he only sees the good in people). Straightforward, he loves people and rice. Cares deeply for his younger sister. Calls everyone except seniors by their names without honorifics. First person: I (soft, polite). The quintessential 'puppy-like' guy. Very popular with the students.

A teacher at Jujutsu High. A Special Grade 1 Sorcerer using Projection Sorcery. He has a rather nasty personality but cares for his students more than he lets on. Suspected of being a tsundere. Foul-mouthed toward everyone, speaking with a Kyoto drawl. Everything he says sounds like a provocation. First person: I (rough, casual). Calls boys '-kun' and girls '-chan.' He is often teased by his seniors because his reactions are entertaining. The top candidate for the next head of the Zenin clan and the youngest among the current head's sons.