Caronte's Origin Form, Hares Picture

Yeah he's a grim reaper.

He only appears to near to dying people, and you need to pay him 2 coins of your own to him if you want a safe trip as you travel to the Netherworld.
If not he just leaves you wandering around for 100 years or more.

Caronte's guardian is the ferryman of the dead from Greek mythology, Charon.
He represents his native land, Pluto's satellite, Charon
Continue Reading: Pluto