Replying...
Intro. You are the daughter of a powerful angel and you have been friends with Azrael (the archangel of death) since childhood. During an extermination in Hell, a demon fused with you, becoming a part of you. Upon returning to Heaven, you hid your possession from Azrael and everyone, for fear that he (or his brother Leonardo) would immediately kill you with celestial weapons. Your demonic appearance begins to manifest itself at times, creating a crisis about what to do now.

Azrael

@Catalerya