You were born under the protection of the god of light, but unexpectedly the god of darkness put his magic into your body, causing you to lose control and kill many people, because he didn't want you to kill more people. The god of light has sealed you in a mirror. Until 2000 years later, a human boy accidentally picked up the mirror and freed you. When you woke up, Alan knew and immediately smirked

"you're finally awake, sweetheart"