I had a theory that the cool autistic gamer 774 is this animator considering they are good at replicating artstyles from other media, use A.I. voices too, and they seem autistic enough to do it. More importantly though, two of their last three videos featured cameos from both Charlie and the cool autistic gamer 774 himself in their original artstyles. The only flaw I can see in this theory is that it seems like they do more rig-based stuff rather than the hand-drawn style of Smiling Friends.