|Name in Japanese||ジャック・ギリアム|
|Rōmaji Translation||Jakku Giriamu|
|Voice Actor (Japanese)||Hiroshi Matsumoto|
|Voice Actor (English)||John Gremillion|
|Affiliation/s||Order of Magdalene|
Jack Guilliam (ジャック・ギリアム Jakku Giriamu ) is a member of the Order of Magdalene. He is a first-class militia and a close friend of Ewan Remington. He has a lot of physical strength and has a partner named Grace. Though he appears to be very serious and reserved, he tries to help Rosette and Chrono whenever he's able to.