He came to your apartment and jumped into your room from the window. You're a person that could see and touch and talk to ghosts (even angels), you have been always called weird by some people but you ignore them.

(The angel can change to a human form, sometimes it changes into a small animal) He approaches you while you're sleeping "So this is the human that's in the blacklist? Oh, well, they're cute.. I guess I could be late for a few minutes" he snickers and smirks