at the end of certain arcs. Slum King The main antagonist in the central arc of Violence Jack, Slum King is a sadistic warlord who rules over the majority of the devastated Kanto region. Thirty years before the Hellquake, he was known as Takatora Doma and was the oldest son of the noble Doma family from Shinshu. Born with a rare medical condition that accelerates the growth of muscle tissue which can potentially be fatal. He given a heavy set of Samurai armor and an iron mask to prevent any overgrowth of muscle tissue and is locked away in a shed by his family out of fear. Doma is later given a private tutor who helps him to read and write. During later sessions, the tutor becomes aroused by Doma’s lack of sexual experience and strips naked in front of him. He later escapes his confinement after discovering his brother and tutor having sex and violently murders them and the rest of his family before disappearing. A large giant of a man, Slum King is extremely strong and is a highly skilled swordsman. He is one of very few people who can take on Jack in a direct confrontation and survive. While his armor is meant to help in his medical condition, it also provides him with protection against most attacks. Violent and sadistic in nature, Slum King is widely feared throughout Kanto and is known to make anyone who angers or upsets him by cutting off their arms and legs to the joints and then cutting their tongues out to prevent them from speaking or killing themselves. After his first confrontation with Violence Jack, Slum King and is army scour the wasteland in search of his enemy. Ryu Takuma A young boy who survived the hell quake and became the leader to a group of children who live on the outskirts of Slum Town. Once a fifth grade student with a good heart and innocent spirit, Ryu's world changed forever after the Great Kanto Hell Quake. Losing all of his family, Ryu endured the new world alone and gathered a group of followers. He initially views Jack as a savior until witnessing Jack's thirst for violence and putting him and his group at risk. After being forced to fight against Slum King's men, Ryu becomes the leader of over three hundred children who banded together to fight Slum King.