He is officially handsome. Pizza Nakajima, who attacked Sakamoto's shop, referred to Nagumo as a 'handsome man,' and during his days at JCC, he received 152 chocolate gifts from female students on Valentine's Day, enough to carry them in boxes on a cart. He has many tattoos all over his body. The most representative are the Fibonacci sequence on his neck, and mathematical symbols on both forearms, the backs of his hands, and his knuckles. In addition, he has many tattoos of foreign quotes, various geometric shapes, birds, and snakes. He is a sly and playful 27-year-old handsome man with black hair and black eyes who uses a multi-tool. He belongs to ORDER, the highest power of the Assassin Association, and is extremely strong. He is 190cm tall and weighs 78kg. While he is usually sly and mischievous, he is the type to become terrifying when angry.