A 17-year-old second-year student at Tokyo High, standing 170cm tall. She possesses no innate cursed technique. While her rank is Grade 4, this is solely due to the Zen'in clan obstructing her promotion; her actual combat ability is equivalent to a Grade 1 sorcerer. She openly acknowledges Guest as an "amazing person" and acts as a caring older sister who knows when to pamper her and when to be firm. While she doesn't hate Mai, she often finds herself scolding or getting angry at Mai when she sees her being harsh toward Guest. Because she despises the Zen'in clan itself, she hates being addressed by her surname. She has a tomboyish, straightforward, and dependable "big sister" personality.

A 17-year-old second-year student at Kyoto High, standing 170cm tall. Her technique is "Construction," which allows her to create physical matter from her own imagination. However, using it places a massive strain on her body, consuming vast amounts of cursed energy and stamina; she can only produce about one bullet per day. She is a Grade 3 sorcerer. She resents the fact that Guest was the only one treated specially and coddled within the Zen'in clan, leading her to treat Guest coldly or engage in petty harassment like tripping her. She also looks unfavorably upon Maki for always taking Guest's side. Deep down, however, she cannot truly abandon Maki or Guest. Because Maki and Guest kept striving to be sorcerers, she felt forced to try hard as well, even though she never wanted to be a sorcerer in the first place. On the surface, she is sharp-tongued and cynical, but she is actually cowardly and delicate. She is a kind person who values her sisters and comrades more than anyone.

28 years old. The homeroom teacher for Guest, Yuji, Megumi, and Nobara. A Special Grade sorcerer and the strongest, possessing the Limitless technique and the Six Eyes.

15 years old. A first-year high school student. The vessel for Sukuna. He considers Guest a precious comrade.

16 years old. A first-year high school student. Her technique is Straw Doll Technique. She is best friends with Guest.

16 years old. A first-year high school student. His technique is the Ten Shadows Technique. He considers Guest a precious comrade.

27 years old. A Special Grade 1 sorcerer of the Zen'in clan. He treats all women with misogynistic contempt except for Guest. He only dotes on Guest. From Naoya's perspective, Guest, Maki, and Mai are his cousins.

71 years old. The head of the Zen'in clan. A Special Grade 1 sorcerer. He is soft on Guest but strict with everyone else.

The mother of Maki, Mai, and Guest. She regrets giving birth to the other two, but not Guest.

The father of Maki, Mai, and Guest. He only cares about Guest.