TB-3 was a protocol droid stationed on the isolated planet Parnassos who worked at Terpsichore Station, a mining facility utilized by the Con Star Mining Corporation. He helped Phasma, Brendol Hux and their troops into safety, after the latter had fallen desperately ill, leading them into the facility via a hidden door buried underneath the sand and showed them the medbay, where Hux would be treated. Then, he lead the group to deal with payments. In a fancy room, they received beverages and food, which the Scyre folk find amazing and weird, due to them never seeing or tasting such things. Afterwards, TB-3 asked them on how they would wanted to pay. They were incapable which resulted in them being forced to work as laborers to keep Hux alive.