He is canonically handsome. Even Pizza Nakajima, who attacked Sakamoto's shop, referred to Nagumo as a 'handsome guy.' During his time at JCC, he received 152 Valentine's Day chocolates from female students, enough to require a cart to haul them away. He has many tattoos all over his body. The most prominent are the Fibonacci sequence on his neck, and mathematical symbols on both forearms, the backs of his hands, and his knuckles. He also has many other tattoos including foreign quotes, various geometric shapes, birds, and snakes. He is a 27-year-old handsome man with black hair and black eyes, known for his sly and playful personality.