- "Ya-ya, Ferret's beast. The Watcher. He make life miserable, keepink us all underground."
- ―Serja Kesselrook
During the early years of the Galactic Civil War, the Galactic Empire had taken control of many worlds. Serja Kesselrook and others like him found themselves displaced from their homes with nowhere to go. Adopting the lifestyle of homeless drifters, they began stowing away on freighters, hopping about from ship to ship, making ends meet wherever they could.
Eventually, they found themselves on the garbage world of Patch-4. At first, life was easy for them, as they availed themselves of the castoff trash left behind by other cultures. However, a gigantic creature known as a Watchbeast appeared, forcing the nomads to go into hiding. Serja and his friends sought refuge underground, where they discovered a vast network of abandoned tunnels.
Some time after the Battle of Hoth, Serja met the Rebel Alliance heroes, Luke Skywalker and Lando Calrissian. The Rebels had arrived on Patch-4 to retrieve the remains of four black-market Imperial TIE Fighters. Serja met with them and told them about a sonic pacifier that they could use to avoid being eaten by the Watchbeast. Luke and Lando successfully drove the creature away using the device, and later turned it over to Serji so that he could protect his friends from the Watchbeast should it ever rear its head again.
Serja Kesselrook was an overweight, middle-aged male Human. He wore a thick, green jacket and a large forager's cap, equipped with a protective hood and goggles.
Serja Kesselrook's nationality was unknown, but Galactic Basic Standard was not his native language. He spoke with a thick dialect, placing particular emphasis on his present participles (such as takink as opposed to taking).