ML plans to commit suicide for the whole story and eventually tries to
FL eventually tries to commit suicide (pretty sure she has contemplated it a lot before that as well)
ML committed suicide but was revived
FL is terminally ill but has accepted it and doesn't care anymore
FL committed suicide in her previous life
ML contemplates committing suicide
ML is actively trying to (indirectly) commit suicide
FL (trans woman) eventually tries to commit suicide
The Regressor’s Personality Training
(novel only)
ML knows he's slowly dying but doesn't care
Runaway Esper
(novel only)
ML has accepted the fact that he's going to die but doesn't care anymore (I think at one point he does try or simply gives up on living, don't remember)
A Trace of the Wonder