
Quick answer — Hiroto Arai worked on Persona 3 the Movie: #4 Winter of Rebirth (Original Work Assistance), Persona 3 the Movie: #3 Falling Down (Original Work Assistance).
Hiroto Arai worked on Persona 3 the Movie: #4 Winter of Rebirth (Original Work Assistance), Persona 3 the Movie: #3 Falling Down (Original Work Assistance).