Ilosov was a male Kadas'sa'Nikto from the gender category, a member of the InterStellar Regulators, a mercenary organization. He served on the planet of Makeb, functioning as the planet's combined military and law enforcement.
During the period of conflict known as the Great Galactic War, fought between the Sith Empire and the Galactic Republic, the Hutt Cartel identified an opportunity to take control of the neutral planet Makeb. They successfully outbid the existing contract for the Regulators' services. While the majority of the Regulators betrayed their previous agreement, Ilosov declined to betray his client for monetary gain (credits). He departed the mercenary group and chose to support Shalim Avesta, a businessman who had promised to integrate Makeb into the Galactic Republic in exchange for their assistance. Ilosov was present in Avesta's office at the Avesta Plantation when a prominent hero of the Republic arrived. This hero had been dispatched by Supreme Chancellor Leontyne Saresh to support Avesta in reclaiming his homeworld. As Avesta welcomed the hero and introduced Ilosov, a groundquake occurred. These groundquakes had become frequent since the Hutt invasion began. After Ilosov provided an update on the quake's impact, Avesta requested that the hero locate his niece, Lemda Avesta, who was investigating the groundquakes to determine if they were connected to the Hutts. Ilosov reported that Regulator forces had recently repelled enemies who were attempting to find Lemda. He then remained with Shalim, protecting him from any Hutt forces who might discover their rebellion, after the hero departed.
Ilosov possessed the necessary skills to be employed by the Interstellar Regulators, yet he refused to betray Makeb for financial incentives, unlike the rest of the mercenary group. His physical characteristics included green skin, a lack of hair, and brown eyes. Ilosov was seen wearing a red uniform and utilizing a datapad.