When Shaxx expressed a desire to secure additional training grounds for the City, he was given the Redjacks to assist him in his mission.¹ While some expressed doubt regarding the Redjacks’ competence, they managed to secure several sites to be used in the Crucible.²³

Most Redjacks see only a few combat missions. However, combat feed data is shared among all surviving Redjacks, which enables their abilities to quickly improve.⁴

Alongside some Guardians, the Redjacks were responsible for creating the tracks used in the Sparrow Racing League.⁵⁶

Redjacks can also serve as guards, protecting Crucible weapons and supplies.⁷ Some Redjacks serve as construction workers.⁸

Two of the most well-known Redjacks are Arcite and Dahlia, both of whom are known for their age and extensive combat experience.⁹¹⁰ Following the Red War, Arcite and Dahlia may have attempted to modify other Redjacks.¹¹