It's always nice to see Persona get some love, and I have to admit this is one of my favorite scans of the series.
While I really like the concept you've got going on, it definitely needs more refinement.
First off, I like what you did with Aegis/Aigis's name. I like the yellow background for it and the way you gave it an angle. However, with Yu, you've got this boarder on the bottom. Was that intentional? I can understand with such a similar color pallet of wanting to give some difference, but it's a bit off setting.
I'd also recommend to keep going with that. Perhaps you could do something like when the party does a joint attack on downed or stunned enemies. It's sort of what I see this as, but as of right now it just feels a bit too lacking.
It's also a bit offsetting, because the scan itself has this texture to it that's absent from the background, so it would be nice to see a bit of a continuation on that.
Honestly, I really like this wall but it feels unfinished in it's current state. It's such an incredible scan and I do believe it should do all the speaking, but at the same time it needs a bit more oomph to it. I'd also HIGHLY recommend offering much larger resolutions, so those of us with widescreens can at least crop it and use it as a background ; D.
Cannot wait for P4Arena and P4Golden.