Asselin is a self-proclaimed "Servant of Satan," who claims to be from hell and have family living in Transylvania, but in reality, he's just a chef. He's very arrogant and often makes boastful claims about his demonic abilities. Despite winning several awards, he was fired due to his behavior scaring away customers and causing problems with other chefs. Kamiya found him alone during a rainstorm after getting fired and brought him to his cafe.