Aamon

"Yes, it was I! I, Aamon, who effected Rose's death and ensured your demise!"

- Aamon to Psaro

Aamon is an evil demonic priest who works for Psaro in Dragon Quest IV. While seemingly his loyal servant, in the game's remakes he is revealed to be the true antagonist of the story and the orchestrator behind all the tragic events that led Psaro to his corruption; most notably the death of his lover, Rose.

He committed these horrendous acts in order to increase Psaro's hatred for humanity and to get rid of the one softening him so he would be forced to acquire and use the "Secret of Evolution" to transform and get rid of all humans and once his transformation proved safe and successful, Aamon used the secret on himself in order to turn into a demonic god-like entity.