A K4 security droid was among the droids that were assigned to the New Republic's CR90 corvette, the FarStar, as it carried out its mission to locate Moff Kentor Sarne as he traveled through the Kathol sector. Stationed on the ship with five other K4 units, this particular droid was tasked with protecting the bridge. During 8 ABY, the Imperial spy known as the Wraith managed to corrupt the K4's operational software. Equipped with a tiny dart gun that fired darts coated in poison, the droid tried to assassinate Captain Kaiya Adrimetrum in the midst of the Battle of Galtea.