I made a topic on the official Sakura-con forums here for Persona cosplayers!
I'll check this topic out frequently as well. I'm planning on going as Akihiko (P4 Arena ver.) on Day 0 (and possibly Day 3) while blasting some Persona music on a boom box. Hopefully it's going to be as badass as it sounds. Always looking for more Persona cosplayers to hang with.