Louis Sullivan Jr.

Louis Sullivan Jr. was an exotic materials specialist at Pytheas during Prey: Mooncrash.

Background
Louis Sullivan Jr. worked in the Crew Annex. When the Typhon invaded, he was lucky enough to evade them at first, getting to safety with several other survivors behind a Typhon Gate. However, an attack by a Voltaic Mimic shorted out the gate and the Typhon slaughtered the survivors as a result. Louis - the sole survivor - was able to make it onto the docked shuttle nearby.

Mooncrash
Peter finds Louis dead in the shuttle connected to the Crew Annex that serves as one of the five escape routes. He was killed by a Mimic when the shuttle was compromised. Louis Sullivan Jr. carries random loot.

It is important to note that, as with all other missing TranStar personnel in the escape shuttle, Louis Sullivan Jr. can no longer be found in a run after the shuttle escape is used. The only way to find him again is to reset the simulation.

Trivia

 * Louis Sullivan Jr. seems to be the son of Louis Sullivan. They both have similar roles - both conduct Typhon-related research, both are caught in and likely perished in a major Typhon outbreak (the Pobeg Incident and the Pytheas outbreak respectively), and both serve as characters who write down Research observations for several types of Typhon (Greater Mimics, Cystoids, and Cystoid Nests for the elder and Voltaic, Thermal, and Etheric Mimics for Junior).