[quote=@Noblebandit]
Actually, I am having some trouble introducing him. It's not like I can just say "surprise, he was here all along" because an angel in the group would stick out quite a lot, but I really don't know how to introduce him otherwise.
[/quote]

You can just have him arriving just now, flying in from the sky like you said. He's an 'Angel of Eros', after all.