In Machine, the repair robot arrives on Outpost Black Out to fix the fax machine. However, after Mitchell Miller refers to it as a "bucket of bolts," the repair droid malfunctioned and attacked him. After hitting Miller many times, the repair droid was attacked and deactivated by Nicole Vega. Sometime after, in Replacement, it's revealed that this robot was intentionally sent by Ignacio Dominguez knowing it was defective.
When the fax machine on Outpost Black Out breaks down in Fax, it yells out an error message in the Unit P voice. Because of it being broken, Sarah Daws calls HQ's System Operator to send a robot to fix it.
In Upgrade, Pink is recruited alongside theothertrainingrobots to take part in an actual military operation by Ignacio Dominguez and led by Spartan Louie Vargas to investigate a suspected Flood outbreak, much to Pink's pleasure. Upon landing on Outpost High Ground with Louie and the other robots in Deception, she goes with Louie and Blue to the main gate of the outpost. Once there, the three encounter the bodies of Jack O'Brien and Linda Kelen as Louie realizes he was lied to about why he was sent to High Ground. Before anyone could react, Louie is shot in the head by an unknown attacker as Pink and Blue run to meet up with Yellow and Green. The four attempt to come up with a plan, but when they notice Red had been incapacitated they are met with three Sangheili and a soldier clad in black armor.
The next day, in Ambush, Riel and Kazi hold Pink and the other robots as prisoner as Riel explains that she and her companions are members of The Damned before Corvus enters to explain the situation and attempts recruiting Pink and the other robots to join The Damned. Upon agreeing, Pink pairs with Corvus on a mongoose and are left as the only survivors when they were spontaneously ambushed by Trooper, narrowly escaping by driving into the nearby ocean.