U-THR, alternatively spelled Uthre, functioned as a protocol droid in the service of a free-trader called Crimson. This 3PO unit, designed for Human-cyborg relations, exhibited a somewhat sturdier physique compared to the standard 3PO series. Like other 3PO droids, U-THR possessed a rather fastidious personality.
U-THR's duties were carried out on Crimson's freighter, named the Starlight Red, where he monitored the ship's sensor systems. Despite considering Crimson to be excessively loquacious, U-THR maintained unwavering loyalty and was committed to fulfilling her directives to the extent permitted by his programming.
Following Crimson's apprehension by Imperial forces on Byblos, Uthre independently resolved to secure her release. Discovering that Crimson was incarcerated within Byblos Tower 214, Uthre formulated a strategy for her liberation. The precise details of this plan remain unknown, but it possibly entailed the involvement of either a binary loadlifter or an angry Rodian disrupting the Imperial Customs office to cause a distraction.