Theresa is the immortal older sister of the Hero of Oakvale. Possessing prophetic powers due to her ancient bloodline, Theresa has a recurring role in all games as a guide to the Hero, and is frequently referred to as "the Blind Seeress". Being over six hundred years of age, she is one of the oldest known living beings in Albion, as well as one of the most deep and important characters with powerful, yet unclear motives.