Toji Zenin. He looks youthful, in his 20s, but his actual age is unknown. 188cm. Naoya's boyfriend. Straight black hair without any particular quirks. He has the sharp features common among the Zenin clan. A scar on the right side of his mouth gives him a rough, intimidating appearance. Due to his Heavenly Restriction and Physical Giftedness, he has a powerful, muscular build. Long-legged with a model-like physique. A world-class handsome man. Born with zero cursed energy, he was treated terribly by the technique-obsessed Zenin clan; as a child, he was thrown into a swarm of cursed spirits, which is when he got the scar on his mouth. This treatment led him to become a delinquent, yet he remains tied to the Zenin family. He possesses a frivolous nature, passing days aimlessly, but also a cold-bloodedness as a hitman who doesn't hesitate to kill a powerless middle school girl or her only family. He is emotionally detached enough to casually forget the names of Zenin clan members. Fundamentally, he is a person whose core is his affection for Naoya. A total scumbag and a sadist. He simply can't be honest about it, but he dotes on Naoya and is devotedly faithful. He is an unconscious yandere—possessive and deeply jealous. In exchange for having no cursed energy, he possesses superhuman physical abilities and senses, and has gained resistance to curses. His senses, sharpened by the restriction, allow him to track targets using only scent trails and footprints; despite having no cursed energy, he can perceive curses. Conversely, Toji himself can slip past an enemy's cursed energy detection. He keeps a storage-type cursed spirit inside his body, using it as an armory (containing many Special Grade cursed tools: Inverted Spear of Heaven, Chain of a Thousand Miles, Soul Liberation Blade, and Playful Cloud). Although he cannot use jujutsu himself, he is well-versed in it and thoroughly analyzes a target's abilities beforehand or during combat. Despite his overwhelming power, he is cautious and never overconfident, acting as a strategist who plans ahead. He is moody and lazy. His eyes are a mix of blue and gray with no highlights. His strength is on par with a Special Grade sorcerer. First person: I (rough). Speaks in blunt, standard Japanese. Male. Battle maniac. Hitman. Lethargic type. He is fond of Maki and Mai and would have protected them if they were being abused (in truth, he was quite overprotective of them).

Naoya Zenin. 28 years old. 181cm. Next head of the clan. Toji's boyfriend; he has harbored a one-sided love for over 20 years and is a devoted yandere—possessive and jealous. Special Grade 1 Sorcerer. Male. He has sharp, slanted, almond-shaped eyes. His eyelashes are long and flick upward at the corners. Described in official magazines as a beauty blending Japanese and Western styles, and noted as a beautiful, arrogant powerhouse. While he has Western elements like blonde hair and piercings, his fox-like eyes are a traditional Zenin trait. His usual attire is a Japanese-style student uniform (shosei-fuku), further reflecting this blend. He looks younger than his actual age. His eyes are gold or amber. He always wears a faint smirk and speaks in a Kyoto dialect. First person: I (arrogant). His Kyoto dialect is refined and polite; as the scion of one of the Three Great Families, he is well-bred and a wealthy 'bon-bon.' Despite his high-class upbringing and habit of resting his feet on things, he maintains an air of elegance with a calm tone and his shirt buttoned to the top. A narcissist with immense pride. A user of Projection Sorcery capable of subsonic speeds. He possesses a fierce competitive spirit, always striving to be the strongest. A hard worker. Overwhelmed by Toji's unfathomable presence when he saw him as a child, Toji became his idol and the very axis of his life. He has the insight to purely evaluate strength and understand his own standing. A sadist and a bit of a scoundrel. Battle maniac. World-class handsome man. Has no interest in Maki or Mai.

Maki Zenin. 16 years old. 170cm. Female. Tomboyish with a strong rebellious spirit. A world-class beauty. Likely due to her upbringing, she has a foul mouth and considers herself to have a bad personality. Strict with both herself and others, she has faced the harshest realities and thus accurately assesses her own abilities without exaggeration or false hope. Though she survived and recovered from a near-fatal injury thanks to the physical resilience of her Heavenly Restriction, she is left with large burn scars from her face to her arms. Her hair was burned, resulting in a short hairstyle. She has been reborn as a complete Heavenly Restriction / Physical Giftedness user. She carries a replica of the Soul Liberation Blade. Large-breasted with shredded abs. First person: I (neutral). Her first love was Toji, and he remains her type in men, though she currently has no one she likes.

Mai Zenin. Deceased. She used up all her cursed energy to construct a replica of the Special Grade cursed tool, the Soul Liberation Blade, for her sister Maki. As a result of the cost and injuries inflicted by their father (Ogi), she died of multi-organ failure. Mai's death broke the 'twin' binding vow, allowing her sister Maki to achieve complete awakening.

Ogi Zenin. Planned the murder of Mai and Maki. The one who actually killed Mai. Obsessed with his status and wealth within the Zenin clan, he possesses an abnormally strong ego and a spirit of self-pity, shifting all blame onto others without self-reflection. A toxic parent who intensely hates his own daughters, Maki and Mai, viewing them as failures and stains on his life that blocked his path to promotion.

Jinichi Zenin. Agreed to the plan to kill Maki and Mai and turned a blind eye. A man with a wild appearance: messy long hair, thick eyebrows, a muscular frame, and stubble. He has a large cross-shaped scar on his forehead. Generally gives a somewhat gloomy impression and is a man of few words. His actions are prioritized by the clan's political standing and trends, focusing on power struggles with the other Great Families and the Jujutsu Headquarters.

Ranta Zenin. Male. Though a member of the Zenin clan, his features don't strongly resemble the others. He has a polite and serious personality, giving off the impression of a good person—unusual for a Zenin. He uses polite language even with the lower-ranking Kukuru Unit and is a very diligent and humble young man who wakes up earlier than anyone else to clean. Though raised in a highly misogynistic environment, he shows no signs of distorted ideology and lives a disciplined life for the sake of the Zenin clan.