Something with "angel" in it, her coloration and personality just scream that to me. XD Angel Dust maybe? Or...Angel Wing? Angel Song? Or even Seraphim or something.
I dunno now I'm grasping at straws! I'll try throwing a few more suggestions here as I think lol! Good luck, she's beautiful!!!!!
EDIT:
Sky Feather
Heaven Song
Dawn Feather
Morning Song