Define 'angel'.

Jane Doe or Miss Day, pick a name to call her, neither would be right. This girl is a mute and sure she can write things but not her name, she has no reason not to write it, she doesn't know why she hasn't mentioned it before. Despite being namesless and voiceless she is dearly loved by her friends but love-love, that's where these angels come into the story. Just remember that not all angels are good, what about the fallen?