One of the former students at 511 Kinderheim. a pleasant person with an agressive alter ego.
Wolfgang Grimmer was once a former student of 511 Kinderheim, the same one as the monster Johan Liebert, resulting in a level of brainwashing removing almost all of his previous memories. he developed an alternate, Hulk-like personality which would emerge when he is in danger. he also searches for Johan, teaming up with Dr. Tenma.