Jin once worked for the POG helping and scouting out Phi brain candidates. He also traveled around working on his own puzzle solving skills in order to challenge the puzzle of god itself. Somehow during his battle with Count Pythagoras Orpheus was downloaded into his brain. Jin somehow sealed both his mind and that of Orpheus resulting in memory loss.
However, in season 3, after Jin regains his memories, Orpheus awakens and takes control of his mind.
Jin has short, messy, brown hair and brown eyes. He wears a pair of small glasses.