One of the new characters joining the cast of Percy Jackson: Sea of Monsters is Douglas Smith's Tyson, who is featured in the latest character poster. Logan Lerman reprises his title role from Percy Jackson & the Olympians: Lightning Thief, who must go on a dangerous quest to retrieve the Golden Fleece from the Sea of Monsters, to save his homeland. Since Tyson is the son of Poseidon, the God of the Sea, his skills will no doubt come in handy on this epic journey in director Thor Freudenthal's action-adventure.