According to Sound Stage 2, she began her life as a pup for a wolf pack that lived in the mountains of Mid-Childs. She later contacted a contagious disease, and was cast out to ensure the health of the pack. When she was dying, Fate Testarossa comes along, and, feeling pity for her, begs Rinis to save her life. They later remove her soul, and merged it with a magical one, thus making her Fate's familiar. Even though she could have full freedom because of the contract, she chose to help protect Fate instead.