Suicidial characters

Characters 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, including remorse, "honor", avoiding a worse fate, despair, sacrificing oneself for their greater cause/allies, the hero being an insane nihilist, hoping they'll take the villains down with them, or even a redeeming sacrifice and other possible reasons.