Ogion is a powerful Wizard on Gont, famous for having once stopped an earthquake from devastating the island. He lived in Re Albi. Ogion trained Ged and sent him to Roke to study magic. He also trains Tenar and leaves her his house. Ogion's real name was Aihal.
In the short story "The Bones of the Earth" Ogion and his mage-teacher work together to stop an earthquake which threatens to collapse Gont. The teacher gives his life to stop the quake and Ogion survives.