Mareth was a soldier in the Regalian Army and becomes a mentor and friend to Gregor. When Gregor arrived he is one of the two guards assigned to escort the Overlanders to the baths. Later, he saved Gregor and Boots on the beach when the rats attacked them. He pulled Gregor up onto his bond, Andromeda's, back. When the doctors wanted to put him on a stretcher, Mareth refused and insisted on helping carry his bond inside.