Susan Delgado appears in "Wizard and Glass", the fourth book of the series. When Roland is sent away for a mission from Gilead by his father, he meets Susan Delgado. Her father was killed in a horseback riding "accident", and Susan is being forced by her aunt to be the gilly-girl (concubine) of the mayor of her town. Before she is to sleep with the mayor, she falls in love with Roland and plans to run away with him. She saves Roland's group from imprisonment and possible execution. Accused of killing the mayor, she is burned at the stake by the townspeople and her aunt. At the time, she is pregnant with Roland's first child. Roland admits that Susan Delgado was (and in many ways, still is) the love of his life.