Suicidal

Villains who desire, want or are willing to commit suicide for many reasons. In the case of villains falling under Pure Evil, suicide is often a selfish option for them, whether it be a villain taking their own life to escape from justice at the last minute, accepting their fate, or a villain bringing down others with them in a last ditch effort to kill off their enemies. (E.g: Andross blowing himself up in the end of Star Fox Adventure to kill off both Fox McCloud and Falco Lombardi, Frank Horrigan attempting to blow up the oil rig in the end of Fallout 2 to kill off the Chosen One and his allies, and The Ink Demon who ordered the ink creatures to destroy Audrey even though it would likely destroy himself too since he is fused with her.)

Villains who accidentally killed themselves (e.g. Archibald Snatcher, William Afton, Norman Stansfield, General Mandible and Don Eladio) do not count.

Examples are: Samuel Norton, Sal, Cell, Owlman, Isaac Ray Peram Westcott, and Avon Hertz.

This is common for Nihilists, however they can also be Cowards if they take their own lives as a way to escape a situation they know they don't have control over (e.g. Samuel Norton).

Villains who took their own lives CANNOT be Karma Houdinis, even if they took their lives to escape punishment or attempted to do so (e.g. Samuel Norton), unless they have failed in their suicide attempt and get away with impunity.