I loved the progression of getting new skills and supports. The SMT style negotiation mechanic is really cool and it paired with the support system makes battles worth fighting through. Though the encounter rate can get ridiculous at times, like battles appearing the moment you step out of a room. At some point it became too tedious and I just ended up running away from battles. The support system reminded me of the gba Fire Emblem games, good work on that one.
Exploration on 1F can be confusing at times since the hallways look the same and lots of classrooms were sprinkled everywhere. I got lost and had to draw a map to keep track. The quests are great but I think a quest log would be beneficial since it's easy to lose track of objectives and quest giver locations after tons of battles and walking around. Exploration on 2F honestly felt kinda tedious since it's a teleport maze. I would recommend giving the player some sort of way to determine the correct door, rather than trial and error. The battles were balanced pretty well and the Persona boss fights were cool.
Best parts of the game are definitely the art and dialogue. It was fun going back to the 4 girls after recruiting Xinmei for additional dialogue. Koberu and Tristia are my MVPs in battle but Xinmei is best girl. I actually felt kinda bad for Ava and laughed when I realized the plot was basically about a school shooting. Art is top-notch as always and the ending scene with Nora was cute. All things considered, this was an enjoyable ride with some bumps along the way. Great work!