Master Head

Master Head 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. Master Head temporarily possesses Professor Amachi to give the Goseigers assistance, giving them insight about the Yuumajuu's sealing and Brajira. He played a role in giving Gosei Knight the power to help in the Goseigers' final battle with the Matrintis Empire.