『GRIM』

Horse-Face is new here. Let's try our hardest to give him a warm welcome, eh?

When a human commits suicide, this is regarded as a sin; the dead can no longer go to heaven, nor hell. Rather than being forced to wander between for eternity, the heavens give them a way to repent; to return to earth, and sow the souls of the freshly dead or dying. As a grim reaper. The price taken from them is their name, their age, and the memories of when they were alive. They stay the same, as people die and are born around them.

Death is considered a rebirth. Names are discarded, and reapers are rechristened using a rather convoluted rule. They are named after one of their key features. Our main character was feeling a little low, a little slack in the jaw; and, no offence intended, he became 'Horse-Face'.