Sinder is a hell hound born in hell but hell was taken over by demons, making hellhounds have different appearance except for Sinder and her parents, they were banished from hell and cursed with being half humans. Sinder half human hellhound, her tail is fully made from fire, with a bone like structure in it her hair and fire becomes blue when she becomes angry or more powerful, she has pets known as fire hounds, they are made from fire, and also become blue when they get aggressive or angry