Mog is a recurring moogle name in the Final Fantasy series. It can refer to either male or female characters, and often moogles that play larger roles in the game.
Mog accompanies the player in the Single Player Mode, carrying the Crystal Chalice for the player, allowing them to be free to fight; however, he cannot carry the chalice indefinitely, and will require short breaks occasionally, for which he will alert the player. Mog is first encountered at the start of the game when the player encounters the caravan from Alfitaria. He can also be used for Fusion Spells, and if he is painted in Moogle Paint can use basic offensive magic spells. He is not targetable and will not attack enemies physically.