OO-7JB was a droid residing within the droid settlement of X2-4 on the moon Uffel as the Galactic Republic neared its end. As the Clone Wars progressed, divisions emerged among the droids in the community, and OO-7JB sided with a faction of droids that advocated for non-violence and loyalty. When the Heroes of Cularin journeyed to Uffel to look into these issues, HG-211, who was the security head of the droid community, dispatched OO-7JB to guide the heroes to him.