Suicidal

Heroes who have either attempted to take their own lives or succeeded in taking their own lives, or have been overly eager in the face of death. There can be several different reasons for this, often including "honor", sacrificing oneself for their greater cause/allies, or even a redeeming sacrifice done out of remorse. Other more negative reasons may include despair, the hero being an insane nihilist, their lives being terrible or ostensibly worthless, hoping they'll take the villains down with them or avoiding a horrible fate.

Heroes who accidentally killed themselves do not count, as with heroes who only faked their own deaths.