Yep, concluded Kris, these are definitely AI. AI that were specifically programmed to counter the Avatars that they are matched against. The question is what limits the creation of these fake Avatars, if any...

He looked behind him, and just caught the Ice Avatar about to reach striking distance. Deer had just dealt with the Blue Avatar, and was moving in against the Red Avatar. "Eh, we're about done here. I suppose I could try..."

Kris propelled himself right around and behind the Ice Avatar, unequipped Daybreak (and Nightfall), and grabbed the Avatar around the waist. Having lost some velocity by slowing down, it would take him some time to regain speed for take off. "Hold tight, it's going to be a bumpy ride. And to whoever's behind the mask, we're going to have a talk, you and I."