What's an Aerith's Knight?

Quote Originally Posted by Polaris View Post
I think I already wished him a happy birthday a couple of days before! if not...

*hugs and slap asses* Happy b'day you cuttie
EDIT:
*hugs and slap asses* Happy b'day you cuttie
What ever this Aerith's Knight is, it's a lucky bastard. Though I wonder why one would hug it's asses, let alone why it would have more then one.