A devoted follower is someone who is extremely loyal and dedicated to a cause, person, or idea. A DISCIPLE is an individual who follows the teachings of another, usually a religious figure. An ACOLYTE is a devoted attendant or helper of a religious figure. A FAN is an enthusiastic admirer of a person, team, or idea. A PARTISAN is someone who is strongly committed to a particular cause or group. An APOSTLE is a messenger or advocate of a cause or idea. All of these terms can be used to describe someone who is a devoted follower.