Summary
Johan Liebert serves as the enigmatic "monster" around whom the narrative revolves, with the mystery of his origins driving the plot forward. Dubbed a monster, the next Adolf Hitler, and even the devil, he survived a childhood gunshot wound to the head thanks to Dr. Tenma, a debt that instills a deep sense of gratitude toward the doctor. Throughout his life, Johan has traveled extensively under various aliases, leveraging his exceptional intelligence and charisma to manipulate and corrupt others, often solely to inflict suffering and destruction. While his youthful ambition was to be the last survivor at the end of the world, his ultimate goal shifts by the story's conclusion. Johan acts as both a direct and indirect catalyst for the theme that individuals can become monsters, and he demonstrates a fierce attachment to his twin sister, Nina Fortner/Anna Liebert, refusing to abandon her.
