The droid associate and assignment validator of Ken in the Lost City of the Jedi was HC-100. Constructed by DJ-88, HC-100 possessed a human-like form with silver-colored plating and blue photoreceptor optics. This droid was designed to mirror C-3PO in appearance, and his manner of speaking and gait were reminiscent of a drill instructor. He had a habit of showing up unexpectedly to inspect Ken's schoolwork, regardless of its completion status.