Chozan is the deck wizard of the Nimble Escape, the ship captained by Riish. He learned magic many years ago by stealing a spellbook from an Aundairian wizard that was travelling on the same boat as him. When the wizard finally realised their spellbook had been stolen, Chozan was long gone, working on another ship.
He's been a member of the Nimble Escape's crew for some time now, enjoying the respect that his power affords him.