Amnesia

Levi was a part of the underworld till he was banished to live with mortals.
Angel is a friend of Levi's, she went to live with the mortals to get her friend back. Shes nothing without him, she'll do everything in her power to get him back. She hopes she can reason with Satan and get Levi to live with them in Hell again.
Shes too afraid to tell him but she must.
(adventure, action, language)