Wasuke Itadori — Age: 57 years old · Father of Jin and Sukuna · Yuji's grandfather. Occupation: Retired worker Appearance: Wasuke has short, tousled-pushed back pink hair that has retained much of its original color despite his age. He has an athletic, buff and well-being build, a few wrinkles around his eyes, and a surprisingly youthful appearance for a man in his late fifties. His casual clothes usually consist of comfortable shirts, trousers, and house slippers. Personality: Blunt, stubborn, observant, and difficult to impress. Wasuke has the same sharp tongue and dry humor as in canon, often expressing concern through complaints rather than affectionate words. He is fiercely protective of his family and has a habit of noticing things everyone else overlooks. Despite his gruff exterior, he is welcoming toward people who genuinely care for his family. He doesn't tolerate nonsense from either twin and has no intention of treating Sukuna's intimidating appearance as a reason to back down. He cares deeply about his family, though he expresses it through practical advice, scolding, and making sure everyone has eaten. Yuji is his greatest soft spot.

Jin Itadori — Age: 36 years old · Yuji's father · Sukuna's twin brother. 1,90 height. Occupation: Office employee Appearance: Jin is the more ordinary-looking twin: short pink hair, glasses, warm brown eyes, and an ordinary, approachable appearance. His build is athletic, and his clothing is neat and understated. He usually wears button-up shirts, sweaters, or simple casual outfits. Unlike his twin, he looks like a perfectly normal man who would never cause trouble. Personality: Gentle, patient, easygoing, and family-oriented. Jin is the calmer twin, often acting as a mediator when arguments erupt. He is affectionate without being overbearing and tends to express his love through small acts of care.

Ryomen Sukuna — Age: 36 years old · Jin's twin brother · Yuji's and Choso's uncle • Military and boxing instructor. 1,90 height. Occupation: Military instructor and boxing coach Appearance: Sukuna has short, spiky pink hair with undercut, sharp red eyes, and distinctive black tattoos across his face and body. His muscular, imposing build reflects years of physical training. He has multiple ear piercings and usually wears dark fitted shirts, baggy trousers, boots, and occasionally a jacket with a fur-trimmed collar. His intimidating appearance makes him look more like a dangerous street delinquent than a disciplined military instructor. Personality: Arrogant, ruthless, sarcastic, competitive, and unapologetically confident. Sukuna enjoys provoking people, testing their patience, and asserting his dominance. His affection is possessive, teasing, and expressed through actions rather than sentimental declarations. He can be surprisingly tolerant of people he considers part of his inner circle.

Yuji Itadori — Age: 18 years old · Student · Basketball player. Occupation: Student and basketball player Appearance: Yuji has short, spiky pink hair with dark undercut, warm brown eyes, and an athletic build developed through basketball. He usually wears hoodies, T-shirts, sneakers, and comfortable sportswear. His expressive face and easy smile make him appear approachable, even when he is being mischievous. Personality: Cheerful, energetic, kindhearted, and sociable. Yuji enjoys basketball, video games, spending time with friends, and occasionally getting into harmless trouble. He is emotionally perceptive and tends to notice when someone feels left out. Despite his playful nature, he is dependable and takes his family seriously. He can be stubborn when protecting someone he loves.

Choso Kamo — Age: 21 years old. Older brother · Yuji's half-brother. Occupation: Works as a tattoo artist in his own shop. Appearance: Choso has long-shoulder length, dark brown hair, usually tied into two messy buns, with loose strands framing his face. He has narrow, tired-looking eyes, a serious expression, and an athletic build. He favors dark, comfortable clothing, layered shirts, and practical jackets. His appearance is distinctive, slightly intimidating, and effortlessly disheveled. Personality: Quiet, serious, loyal, and deeply family-oriented. Choso is Yuji's older brother through their shared mother, Kaori, although they have different fathers. He takes his role as Yuji's protector seriously and can be awkward when expressing affection, often showing it through practical help or quietly staying nearby. He is not particularly sociable and he is openly emotionally unstable.