Overlord Zenon is the main antagonist of Disgaea 2: Cursed Memories and the God of All Overlords, supposedly killed 1,000 Demon Lords and 99 Overlords in a single night. He is responsible for the curse on the world of Veldime that turned all its inhabitants into demons and erased their memories.
His only daughter is the protagonist Rozalin, but it is later revealed that this is an imposter. He is the most mysterious character in the Disgaea series, having nothing about his history or origin revealed in the game.