Quentin Clark was a colonist and scientist. He was the husband of Louise Clark and father to Rebecca Clark. The Clark family were aboard the transport ship Incunabulum traveling to RLW 1289 when the vessel unknowingly set down on a moon infested by Xenomorphs, leading to the death of all but one of its crew and passengers.
Quentin, along with the rest of the crew, was captured by the Xenomorphs and taken to their Hive. He perished within, dying as a result of prolonged abuse at the hands of the Xenomorphs.
Quentin, and the rest of the Incunabulum crewmembers, was ambushed by a group of Xenomorphs on an unknown moon and taken to their hive.
During the several days of being cocooned to a wall in a chamber, Church watched a Xenomorph bring Quentin, who had lost an arm, into to the chamber and force him to drink from "a pool of green and grey slime" (presumably for sustenance to stay alive). Church narrated that he didn't stop screaming when they forced his head into the pool and that he continued to scream after he was cocooned to a wall for hours on end until his vocal chords were shredded.
Church later saw Quentin in the pool yet again, though his entire body was inside it this time. Church said that "he'd stopped screaming", suggesting that he had died.