Крістоф Сіверніх

Johan's disciple and another survivor of 511 Kinderheim. He and Johan decided to meet each other again in 10 years after they escaped the orphanage, and in the end they meet at a party with the guidance of Eva Heinemann, who was hired to point Johan out. His deceased stepfather was one of the four individuals of Neo-Nazi, and he was likely to succeed the post. He possesses qualities similar to Johan's and intimidated Martin, Eva Heinemann's bodyguard, by reminding him of what happened to his mother and wife. Nothing else is known about Christoph, other than that either Johan or the organization of the four individuals tried to change him into the second monster.

He first appears in chapter 124. (Source: Wikipedia)