"Genko: You wanted her enough to break a sacred taboo, that angel."
"If that girl's wish is granted you really won't be able to obtain her."

From these lines it seems that "that angel" and "that girl" are two different beings. "That girl" with a wish is obviously Kobato. The "her" is obviously "that angel" Ioryogi wants. So I don't think Kobato is the angel. ^_^ Well, that's what I think. I dunno if it made sense. heehee~

Thanks for the translation. :D