Charon is the tyrant dragon king of Eastern Harmonia in Wish Upon a Pup.
Charon really hates "two-leggeds" and thinks they're all evil. (He's one to talk) His hate has made his heart as dark as night and cold as snow, that he can't escape it. Sunshine Giggles tries to use her powers to dispel that dark coldness at one point.
Charon is a black dragon with red edge scales and green wings. He has red eyes He wears a giant crown and a red king's cape.
- Charon's body appearance is a little similar to King Sombra (My Little Pony Friendship is Magic)