Complete Monster

This kind of villain is pure evil and irredeemable. They do bad things without a reason or so, and are proud of it. Heroes would be scared of them, even their allies if they could turn against them. The only way to get a happy ending is if they die or don't appear in that work anymore.

NOTE: Do NOT add heroes, villains who have redeemed themselves, anti-heroes and anti-villains, remorseful characters, etc.