Serial Designation X (or just X) is a robotic Disassembly Drone with a black screen on the top half of his face, which displays his neon yellow eyes, expressions, and can show emojis/text. He has a headband with five lights containing highly corrosive Nanite Acid. He has a dark gray tongue and retractable fangs. He also has a long black tail ending in a syringe holding Nanite Acid. He has spiked silver hair. He has a black short-sleeved coat with a fur collar. He also wears a black beret.