Hades

King of the Underworld, ruler of the Greco-Roman afterlife. Quite literally took a wife by the name of Persephone, daughter of Demeter. Is often branded a villain in most modern works, even though he's portrayed as a "strict and just, even handed" ruler in ancient depictions. Does not really have blue fire for hair.

"Do you see that quiet guy in the middle of that crowd? Definitely a Hades."