Unkar was the only Junk Boss on Niima Outpost, exchanging parts for Scavengers' rations. He also stole the Millennium Falcon from the Irving Boys and began to modify it (detrimentally, according to Rey). It was also indicated that he looked after Rey during her childhood on Jakku. However, he was not above verbal abuse towards her or taking advantage of her due to his belief that she was just another asset for him to use.
At the first glance, the Crolute junk boss may looked like a mere abusive slavedriver for scavengers that worked for him, including Rey. But upon seeing Rey with the lost BB-8, he reports the droid's location to the First Order, revealing that he is either a First Order sympathizer or simply seeks a reward. When Rey and the defector stormtrooperFinn steal the Millennium Falcon from him only a few minutes later (not realizing its significance), he angrily demands them to return it to him.
Though he is not seen again in the finished film, it is revealed in a deleted scene (and the novelization) that he followed the group to Takodana. After Rey and Finn sought the help of Maz Kanata alongside Han Solo and Chewbacca, Plutt confronted Rey and threatened her, causing Chewbacca to intervene. When the angry Crolute declared he was not afraid of what he considered to be "half a wookiee", Chewbacca showed Plutt the error of his judgment by easily and casually ripping off the screaming Plutt's right arm and tossing it onto a nearby table as Rey watched in shock.
