Peter Fargason is a major supporting character in the Hellsing anime series produced by Gonzo. He is the commander of the Hellsing organization's paramilitary forces, which places him at the head of the organization's entire military structure. Before joining Hellsing, he served as a captain in the British Army, and he is characterized as a veteran soldier and a father.

In his role within the story, Fargason commands the Hellsing military units, and his only superior is Sir Integra Hellsing, although he also listens to Alucard. In the television anime, the military forces under his command operate as a vampire extermination task force and are mobilized whenever vampire activity occurs around London. He also personally found and recruited the group of mercenaries known as the Atheists and Heathens, who were hired to serve the Hellsing Organization.

In terms of personality, Fargason is extremely loyal and dependable, and he can always be counted on to get the job done. Despite holding the rank of commander, he prefers to go into battle alongside his men rather than direct them from a distance. He is an older human male with grey or white hair, a deep voice, and the weathered appearance of a career soldier.

His most significant relationship is with Seras Victoria. He works closely with her to train her into a good soldier and to bring out her talents, and he serves as her first tactical trainer after she becomes a vampire. His relationships with Integra and Alucard are built on hierarchy and professional respect: he carries out Integra's orders and defers to Alucard's authority in the field. His development is presented largely through his steadfast service and his mentorship of Seras.

Fargason's notable abilities lie in military command, tactical training, and combat leadership. His background as a British Army veteran gives him practical soldiering experience, and he is capable of leading his troops personally in dangerous operations against vampires and other supernatural threats.