Prince Pastum is a human prince who was once an unfortunate resident in Castle Captor along with his guardian for 500 years. They worked within the castle to gain the privilege of eating and, along with all the other living residents of the castle, were kept from aging. During the episode, "Lost Smurf" of Season 8, Grandpa Smurf and several other Smurfs managed to free him and the other prisoners from the castle. It is unknown which kingdom he belongs to, who he may have relations with - other than being good friends with Nanny Smurf, and his voice is unknown.