Henry has shoulder-length curly black hair that slightly covers his ears and eyes. He has bright blue eyes, while he also has pale skin. He usually wears the same outfit throughout the series, which is a black long-sleeved shirt and black trousers.

While in the server room, he puts on black gloves and holds a fire axe in his hands. He also has a slight stubble on his face.Henry is described as a quiet, antisocial person in the office. He was quite introverted and didn't have many friends.