Four-Nines, also known as 99-99, functioned as a droid partner for Lah Kara on the planet Hy Izlan, located in the Outer Rim. This droid possessed the ability to fly independently and to discharge blaster shots, which Kara had the skill to redirect using a lightsaber.
The short film "The Ninth Jedi" from Star Wars: Visions in 2021 featured Four-Nines.