Number 6 (Big Guy and Rusty the Boy Robot Animated)
From Multiversal Omnipedia
Number Six was the Legion ex Machina's mole in Quark Industries, under the guise of Dr. Gilder. He grew angry with Dr. Axel Donovan, who kept on sending his robots to the Grinder. Gilder/Six made two attempts on Donovan's life, revealing his true nature, and was captured. Upon an attempt to draw information from his head, Number Six exploded.
