Hilda was born as a Half from a human male, Amgil, and Gajuma female, Naira, which grants her horns and animalistic ears. As a Half, she also ran the risk of dying very early due to a Half's frail body. When Hilda suddenly fell sick, this very reason drove her parents into panic. Amgil took Naira and Hilda into the shrine of the Sacred Beast Gilione, besting many monsters in order to reach Gilione's altar and prayed for her health. The prayer succeeded, and Hilda managed to live.