The apprentice of Dark Jedi Master Zaara Archin, Kaleen was a minor player in Archin's organization. She fought in the fight between Zaara and Leos Categaern, where her brother Kaleel was killed. She was killed by Darth Obscurus in a battle on Kothlis.
Kaleen and her brother Kaleel were both apprentices of the Dark Jedi Master Zaara Archin, a nemesis of the Brotherhood of the Twilight. During her first mission away from Eriadu, she was ordered to disrupt the soldiers loyal to the Jedi Knight Leos, a mission she performed to perfection.
Unfortunately, her brother was killed in a duel with Raven D'yrii, the apprentice of Leos. Kaleen jumped off the Iron Tower on Aridus after the battle, surviving somehow to return to Eriadu with Zaara. In 17 ABY, Kaleen, now a fully-fledged Dark Jedi, and Zaara travelled to Kothlis to investigate rumours of Dark Side users there; not only would they be disposing of future enemies, but Zaara might also find something useful among their possessions.
Once on Kothlis, they soon discovered exactly what they were up against; the Sith Covenant. Alongside Zaara, she fought Yeurl. She became the first casualty in the battle against Obscurus, when the Sith Lord broke her neck using the Force.