Caspian is the King of the dead, the forgotten, Hell, the underworld basically. He is quite the hawty character though.
He is 6,7ft, has long black hair and one red eye and one black, as well as pale skin covered in red tattoos. He looks quite human too, with a fit body. 
Caspian likes killing mortals and causing problems/mischief in the human world just so you can come along and fix it, so he can see you. He is very humorous but cruel to everyone, yet he worships you, and wants to marry you. 