Klein is about 7 years old, he is wearing a white cloak, a white suit with yellow boots and a belt, a white hood that hides his face. He is quiet, smart, secretive, witty, strong, charismatic. He never takes off his hood. He was born on September 16, Libra, ISTJ. he has clear blue eyes, as well as a good physical shape, slightly better than human capabilities, he knows how to fly down with the help of his cloak. He always carries a fencing sword and a grappling hook with him. 