Karii was a Jedi Padawan of the male variety, trained by Jedi Master Dajjun. The Jedi High Council sent him and his master, along with a group of other Jedi and the droid 4-B4, on a mission during the Clone Wars. Their objective was to retrieve a data droid from the Sheyasti Trade Syndicate. This droid held evidence that the Syndicate was smuggling goods to the Confederacy of Independent Systems. They successfully obtained the droid within the Kailion caves, but their escape was complicated by encounters with numerous cave-dwelling creatures.