Zan

斬

Zan, known as Slash in some dubs, is an evil entity that arose due to the desperation of the En's sister, while she remained paralyzed for several decades in the Needle Tower. In the anime, Zan is responsible for destroying En and his sister's home planet. He is also the one who spreads the Awakening Poison and creates the Troublemaking Monsters throughout the the Twelve Worlds. (Source: Villains Wiki, edited)