He was an Eevee with a young trainer named Alex who only wanted a buddy so they never battled for the most part. Until one day when Alex got caught in a wild Pokémon attack that ended with his death. Frost was distraught and angry but he knew that he wouldn't be able to fight them off so he was force to flee. He was alone with a purple scarf being the only memory left of his trainer. Now he travels with Alex's death repeating in his mind on loop. He is very aggressive and extremely hostile