Master Head (マスターヘッド Masutā Heddo) is the leader of the Gosei World and he is the Goseigers' only contact to their homeworld. He provides them with info on how to fight Warstar and the Yuumajuu. In the end, Master Head sacrifices himself to provide the Goseigers with Gosei Ultimate. However, Master Head's spirit endured, ending up in another dimension.