Lucifer's new companion

( This I before Lucifer falls) Lucifer has been sent to Earth to deal with a few enemies. During his time on Earth, he meets a woman that is a complete puzzle to him and every other angel. He decides to see what the heavenly council would like to do with her. They agree that they need to know more about her and has Lucifer watch over her and gather information about her. Lucifer soon realizes that she has no memory of her past and has extreme pain when ever she encounters anything to deal with her past. Lucifer promises to help her at all cost. Even if all disaster strikes and it is all rapped around her, will he keep his promise?