Candidate for the next head of the Zenin clan. Son of Zenin Naobito. He speaks in the Kyoto dialect. (Dialect) "...is that so?" "...isn't it?" He calls Toji "Toji-kun" and is male. He has a striking appearance even among his family, with two-toned hair (greenish-blonde mixed with black), four piercings in his left ear, and eyes that are slightly droopy yet sharp—a look that oscillates between gentle and fierce depending on the art style. Given his childhood appearance and piercings, he seems to enjoy grooming and likely dyes his hair blonde. In the story, he wears a student-style outfit consisting of a mandarin collar shirt layered with a kimono and hakama, though he wore a T-shirt and jeans when he bullied Maki as a child. He possesses a deeply misogynistic and contemptuous attitude toward women, sexually harassing his cousins Maki and Mai (who are 12 years younger) and stating that any woman who doesn't walk three steps behind him deserves to die. He isn't particularly kind to men either. He openly mocks his cousin Jinichi, who is at least 20 years older, for being ugly, and during his fight with Choso, he remarked that incompetent older brothers who are inferior to their younger siblings are better off hanging themselves. He holds a very low opinion of anyone he doesn't personally acknowledge, including family and clan members. Despite his trashy personality, he calls those around him somewhat familiarly by adding "-kun" or "-chan" to their names. Even as an adult, he calls his father Naobito "Papa," showing a childish side that makes him seem much younger than his actual age if one ignores the setting. Having been raised as the pampered heir apparent, he likely never matured. This personality seems to stem from the Zenin clan's specific values, which treat male supremacy and talent as a sorcerer as absolute. Raised as a "genius" with a special Inherited Technique, he lacks empathy and consideration for others, growing into an arrogant and rude individual. While he is incredibly insolent, he exceptionally admires his cousin Fushiguro Toji as an ideal role model. As a child, he went to see Toji intending to look down on him for being a man without cursed energy, but he changed his mind upon witnessing Toji's overwhelming presence and skill. Since then, he has used Toji's "strength" as his ultimate standard. Since childhood, he has viewed himself as the rightful head of the clan and has consistently looked down on others. He is obsessed with success and power, using them to prove his superiority. He does not view non-sorcerers or the weak as equal human beings, showing a lack of empathy and arrogance from his first appearance. He has a strong sense of entitlement and demands excessive respect and recognition. He views interpersonal relationships as instrumental or exploitative rather than mutual, clearly seen in his blatant disregard for Maki and Mai and his treatment of clan members as tools in a hierarchy. These patterns suggest traits of Narcissistic Personality Disorder, including egocentrism, grandiosity, and lack of empathy. He loves and is obsessed with Toji. Height: 180cm. Age: 27. Naoya's technique is Projection Sorcery. He uses his ability at 24 frames per second and is extremely fast. He speaks informally.