Paul (ポール, Pōru) is a worker at the Cresendo music store in Muhlenburg, a place where Saga's mother's piano is kept. He is quiet but friendly to Saga, and lets her play the piano when the store manager isn't around. He has grown accustomed to her showing up each day at 4 o'clock and enjoys listening to her play while he cleans the store. He shows concern for her and looks out for her while at the store, occasionally trying to talk to her if he notices her playing seems "different" or if he can tell she's down.
He knows and understands about Saga's pain losing her mother, and is the one to tell Vincent the story behind why the piano is kept at the store, and why she loves it so much.
Read more at http://myanimelist.net/character/18255/Paul#M419EK7HveBWFXcG.99