وولفگانگ گریممایر

A freelance journalist who is researching Kinderheim 511; he is also soon drawn into the search for Johan, as he decides to help Tenma.

[Spoiler: As a former subject in 511 Kinderheim, he had developed another personality: an aggressive fighter that comes out and protects him whenever he is under dire stress, inspired by his childhood adoration for an Incredible Hulk-type TV character whom he refers to as the Magnificent Steiner. He also received training as a spy after his time in Kinderheim 511. He also does not know his real name, so he lets others refer to him as Grimmer Wolfgang.]

[Spoiler: During the Ruhenheim Massacre after witnessing the death of one of the citizens, he manages to get self control against his alternate personality and suicidally murders 4 of the murderers of the villagers of Ruhenheim, where right after dies in front of Tenma, Franz Bonaparta, and Wim.]