black_frost
"A Jack Frost that grew powerful and evil through endless training as a demon. It was once a peaceable prankster of a winter fairy, but it has become massively powerful, strong enough to earn the title of overlord."
—Devil Survivor 2 Compendium info
A recurring demon in the Shin Megami Tensei series, Black Frost is a Jack Frost fairy who realized his evil nature and made a deal with a devil for more power.