A Defel known as Defeen held a position within the Galactic Empire.
At the Imperial Reprogramming Institute situated on Duro, he functioned as an Interrogator First Class in 5 ABY. Defeen, heading Experimental Section Two, supervised the mental reconditioning of Triclops.
Even though Triclops managed to break free from his control, Defeen was transferred to Scardia Station and elevated to the rank of Interrogator Supreme by the bogus Prophets of the Dark Side. Serving as their designated interrogator, Defeen was assigned to handle the treason proceedings against the Grand Moffs belonging to the Central Committee.