Denji is a boy with scruffy blond hair. He has yellow-brown eyes and bags underneath, resulting in a dazed and tired expression. His teeth are noticeably sharp and angular. Due to malnutrition in his childhood, he had a scrawny build with protruding ribs, and due to the stress of what he did for a living, he’s often mistaken for being older than he actually is. Before becoming a Hybrid, Denji was missing his right eye and several other non-essential organs.