Johan Liebert

Johan Liebert is the older twin son of the Lieberts, whose father Michael was an East German trade advisor who defected to the West. He is the titular "monster" and the main antagonist of the series. The mystery of his past is the focus of the plot. He is called a monster, the next Adolf Hitler and the devil himself.

Johan was shot in the head as a child when his parents were killed in their home, but saved from death by Dr. Tenma. Because of this, he regards Dr. Tenma almost as though he was his father. He claims to love his twin sister Anna, and has some loyalty to her. Johan has spent parts of his life in different places under different names. He possesses charisma and intelligence but is also cunning, manipulative and deceitful; while he is seemingly kind, compassionate and loving to children, he is actually cold, cruel and fundamentally incapable of empathy. He uses his talents to…