"Greeed are created through the use of alchemy and desire, and uses the essence of animals as their cores. Technically I refrain from speaking to mammals, but I am curious and a little bored."

He really has no qualms explaining the basics to anyone. After all, it was okay to be curious. It was a good desire and one he just had no problem with so long as it didn't cost him his Cores.

"I'm Ankh, the King of Birds." There were a lot of birds with the intelligence to understand language, more of them that can mimic sounds and speech. Ankh could call on such if he really felt the need to. "Who are you?"