okay no but I just had an idea for Naoya?
Rewatching The Cat Lady and Rule of Rose gave me an inkling of something to do with him on the multimuse
Because they're both games based around coming to terms with things, not necessarily letting go, but acknowledging that there are parts of your life you can just let go of
Or better put I guess is: letting go of small things that lead to big things or finding inner peace.
Don't get me wrong I understand him being hung up on everything is his whole deal but if he began a treck to just let go of smaller things and things that don't add to the picture
He can still hold his grudge but then he can have a better focus on what he's angry about instead of 'we were used unjustly'