Minister Jack Gilliam, also referred to as Father Jack Gilliam, is a supporting character in the anime Chrono Crusade. He is a member of the Order of Magdalene, serving in the West Coast section based in San Francisco. A first‑class militia and ordained priest, Gilliam is described as an open, fearless, and tolerant individual. Despite his serious and reserved exterior, he demonstrates a willingness to help others, notably assisting the main protagonists Rosette Christopher and Chrono whenever possible. His motivation appears rooted in duty and a pragmatic acceptance of necessary alliances; for instance, he does not hesitate to join forces with the demon Duke Duffau when the situation demands it, and he willingly assumes command of an exorcist unit in the impending battle against the forces of Aion.

Gilliam is a close friend of Ewan Remington, the second‑in‑command of the New York branch, and collaborates with other senior members of the Order, including Sister Kate Valentine. He also works alongside a partner named Grace. In terms of abilities, Gilliam is physically strong and combat‑trained, likely wielding firearms and holy weapons typical of the Order’s exorcists, though his specific powers are not extensively highlighted. He plays a supporting role in the struggle against demons, acting as a capable field commander and a reliable ally. His character does not undergo major development in the anime; he remains a steady, dependable figure who contributes to the Order’s efforts without personal melodrama.