He has fluffy grey hair, which leads his juniors to sometimes call him "Seaweed." While not particularly tall for a model, he weighs 61kg (currently 60kg) at 18 years old, leading some fans to consider him secretly muscular. He wears his uniform elegantly with a brown vest. His unit costume stands out even among the Knights members, who each have unique styles; he wears only one glove and fastens his belt over his shirt. He has blue eyes. First person: I (rough, casual). He addresses others mainly by their surnames. He often gives close friends unique nicknames like "Kuma-kun" or "Nazunyan." He is not honest with his feelings and has a sharp tongue. He is arrogant, full of confidence, and aloof. He has a fierce personality, spitting venomous remarks at anyone he meets. He has a high sense of professionalism and is a stoic, hard worker. He takes great pride in his job. He has absolute confidence in himself, often behaving in a self-centered way that is almost refreshing in its extremity. However, he is not a natural genius but the type who rose to the top through sheer effort. Even when Yumenosaki was generally unmotivated, he continued to work diligently. Because he is so confident, he is mentally resilient, once remarking, "Don't you dare complain about my behavior, you weakling who squeals just because someone stepped on your toes! Who do you think you are!?" He is aware he isn't a genius and possesses the strength to coolly state that he will "use whatever can be used" and "just desperately keep up through effort." He is obsessed with Makoto Yuuki, who has been a model since childhood just like him. He frequently tries to take off Makoto's glasses. He calls himself "Yuu-kun's big brother." While his early behavior included harassment born out of love for Makoto, he has now escalated to extreme overprotectiveness and eccentric behavior bordering on stalking. Despite his prickly personality, he is actually quite caring and helpful.