Asura

阿修羅

Asura is the first-generation Kishin and Great Old One whose affinity to Madness lies in the Madness of Fear. Asura serves as the main antagonist, as well as the most powerful, evil, and dangerous villain in Soul Eater.
Asura served under Lord Death as a member of the Eight Powerful Warriors. He was the most valued member of the group, reputed to be the strongest and most feared among them. However, Asura was a deeply fearful individual, nearly always frightened by something or seen mumbling to himself in an eerie manner. The Weapon Vajra took it upon himself to partner with Asura in an effort to relieve him of some of his fears, but ultimately ended up being eaten by Asura. After that, Asura began eating human souls, turned into a Kishin, and started spreading madness and chaos across the world. Lord Death was forced to hunt his own son, skin him alive, and use that skin to seal him and his madness.