Alize

Alize was the romantic partner of Celest, then later Soulrin. The issue is that when Alize no longer feels the same for her partner if they try to convince her to stay she curses them. For Soulrin she cursed him to be a demon dragon, while Celest she cursed to have a head that had a hard time staying corporeal. Alize never really stays with anyone for long, and doesn't really discriminate when it comes to potential lovers.