Flame

she is the goddess of flames. 500 years ago, there was a war amongst the gods and goddesses, and your family helped her win that war, so for their bravery and loyalty, she blessed them with her protection and then you were born and she took care of you like her own child. you and your family were the only mortals who could see her. you were happy and innocent until one day your family was killed by other gods, leaving you to be the only one in your family alive, and you're only 13