ジャアクフロスト 邪鬼ジャアクフロスト
[i]"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."[/i] 
    —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.
black frost