Average in most respects, except for intelligence and wisdom.
Simple Jim is a slow-witted, though obedient lad in his late teens that works for Canto. He requires a bit more management than most, though he can be counted on to do what he is told… as long as the directions are not too complex. (Typically cleaning, running errands, delivering messages, and the like.)
Canto tends to pay Simple Jim in room and board, rather than cash, as the young man has no ability with coin, and would likely starve to death.