CT-66-3233 was a clone cadet in Bravo Squad, a training unit stationed on Kamino during the Clone Wars. Their clone training armor was distinctly marked with the number one.
On the planet of Kamino, CT-66-3233 was grown as a clone from the genetic template of the bounty hunter Jango Fett to fight for the Grand Army of the Republic. Early in the Clone Wars conflict between the Galactic Republic and the Confederacy of Independent Systems, CT-66-3233 became a member of Bravo Squad, a squad comprised of clone cadets undergoing training on Kamino. During their time in training, Bravo Squad impressively completed the practice examination faster than any other squad. When ARC trooper Commander Colt arrived to oversee the final evaluations, Colt summoned Bravo Squad, as well as Domino Squad and two other units, to a hangar within the Tipoca City Military Complex to deliver a speech. During this address, Colt chose Bravo Squad to undertake the final test first, citing their superior performance in the practice assessment.
CT-66-3233, along with CT-66-3232, took the left flank while CT-66-3238, CT-66-3339, and CT-27-3555 covered the right flank as they commenced the Citadel Challenge version THX variable 1138. CT-66-3233 laid down suppressing fire as their teammates advanced, eliminating the training battle droids. As the whole squad pushed forward, CT-66-3233 eliminated a training BX-series droid commando at close range. As Bravo Squad progressed, CT-27-5555, watching from above, remarked that he and Domino Squad were superior. Eventually, CT-66-3339 instructed CT-66-3238 to advance toward the citadel, where they successfully rappelled up and secured the light post, thereby completing the exam. Upon exiting the arena, CT-66-3233, leading the way, taunted the approaching Domino Squad.
CT-66-3233's gear included clone training armor adorned with the red markings of their unit, the number one displayed on their chest plate and left shoulder armor, their designation on their left leg, and a DC-15A blaster carbine firing non-lethal bolts, along with an ascension cable.
The identification number of this Bravo Squad cadet was first seen in the Star Wars: The Clone Wars episode "Clone Cadets". The number shown was 66-3233, with the CT- prefix already established. This method of assigning identification numbers was confirmed by the troopers of Domino Squad.