Joe is determined, confident and usually calm, but can also be impatient and cocky. He's brave when he stands by Jude's side against Kageyama. He seems to be a close friend to Jude, David, and later to Caleb. In the first season, he worries about Jude more than himself, but later he isn't very loyal as he turned against Jude twice (firstly, when he joined Shin Teikoku Gakuen, and secondly when he joined Neo Japan). Joe is usually very serious and doesn't show his feelings.