I, too, am stuck on outfits...Naki has a canon battle outfit that looks pretty cool...I went looking through my fanart folder and found some nice pictures of him in casual modern clothes? And a couple cute magical idol outfits and different color variations of his canon uniform and stuff. Would casual clothes work, they wear casual clothes in most Persona games, right...imagine him fighting in a cute hoodie, that's totally a battle outfit! (???)

His demon is Camio, which is a cute little bird that gives "the ability to understand the speech of animals and hear truths in the sound of running water". His conflict is something along the lines of...the need to return to the war he was supposed to be fighting for the future of mankind, vs his attachment to having a human life of his own with a loving family and a bright future totally lacking in glass-protected display stands.

I'm also unsure whether to go for gun or crossbow, but that's not nearly as big of an issue.