Ghost of Christmas Past

Ghost of Christmas Past is an agent of the Holy Spirit and friend of the Baby Jesus with the powers to send a person's soul back to the past. For some reason, God decided to only give him the power to visit Christmas of past, which really sucks as far as superpowers are concerned.

Popular Culture
Like any "has-been" celebrity with no other achievement, the Ghost has a cameo appearance in almost every show you can find.