Xiao-gang, brother of Junkshop and president of East City, serves as a negotiator with Machines under a guise of lethargy while leading Resistance Group 11—marked by the Eleven branded on his palm. A concealed suitcase carries a volatile substance that activates his transformation into a near-indestructible berserker, unleashing devastating energy projectiles and brute-force dismantling of mechanized foes. This mutation siphons his rationality, driving frenzied assaults on friend and foe alike, with no recollection retained post-reversion.

Prior to the human-machine war, his retrieval of a damaged robot for repairs suggests pre-conflict technical involvement. Later, he intercepts and delivers pivotal intelligence to Group 11, exposing Machines’ imminent annihilation of a city sector—a role that cements his tactical influence. Tasked with mediating between human factions and Machine forces, Xiao-gang straddles diplomacy and the ever-present risk of his own catastrophic power. The contrast between his unassuming presence and destructive potential fuels the core conflict of his arc.