Fef, situated within the Fef system, was a planet of considerable size that orbited a star radiating orange-yellow light. This planet was among those within the Galactic Alliance facing a potential uprising by the Killik.
The insectoid species known as the Fefze originated on Fef, their homeworld. The planet's dense atmosphere coupled with its high temperatures fostered a rich diversity of life, characterized by relatively brief lifespans. The Fefze, notable for forming intelligent collective entities or "swarms" composed of 10 to 100 members, possessed the ability to consume any type of carbon-based organic material. The Fefze never advanced technologically due to the plentiful food sources and their lack of manipulative limbs, resulting in minimal exports. Fef attracted visitors interested in observing the renowned Fefze dance swarms.