Thesus is one of the Sea Watch Guards who watch the sea from the walls of the Royal Palace of Acadia. He is a friend of Andromeda and also is responsible for alerting the Palace if an unidentified ship sails into the harbor of Ethanos. When Andromeda was a little girl, Thesus would regale her with tails of his boyhood days, playing with the creatures of myth in the surrounding countryside.