Vulcan Haestus commands Freeze Force, a militarized police unit dedicated to eradicating Burnish activity. A brutal, arrogant sadist, he dehumanizes Burnish as mere fuel sources, flaunting his dominance through public acts of cruelty. He derides allies and rivals alike, particularly scorning Burning Rescue for their outdated technology compared to Freeze Force’s advanced arsenal. Cloaked in a towering armored exoskeleton of grey, green, and white with a glowing orange visor, Vulcan’s mechanical shell masks a feeble physique. His armor’s imposing design stems from insecurities over his diminutive stature, amplified by reliance on weaponry and vehicles supplied by Governor Kray Foresight in exchange for Burnish captives. In *Lio-hen*, Vulcan outmaneuvers Burnish diversion tactics to ambush their hideouts, capturing lieutenants Gueira and Meis. His triumph crumbles when Lio Fotia dismantles Freeze Force’s ice weaponry during a rescue, publicly humiliating him and cementing their enmity. Vulcan later taunts Lio relentlessly, driven by vengeance. During the main crisis, Vulcan moves to arrest Burning Rescue’s Galo Thymos for obstructing Burnish arrests, retreating only after jurisdictional protests. He escalates his tyranny by raiding a pizzeria, detaining a Burnish employee and his employer without cause. A tracker implanted in an elderly Burnish informant leads him to a volcanic hideout, where he betrays the informant and paralyzes Lio with an absolute-zero bullet. In the finale, Vulcan chases Heris Ardebit after her sabotage of Promatech, thwarted by Burning Rescue’s interference. Fleeing teal flames during the climactic battle, he abandons his armor, exposing his shrunken form. Defeated and stripped of his mechanical might, he faces arrest alongside Kray for their genocidal conspiracy. His alliances hinge on transactional loyalty to Kray, bitter rivalry with Ignis Ex over past grievances, and visceral hatred for Lio and Burning Rescue. Early concept art envisioned a sleeker mech design and prison sequences, later cut from the final story. The name “Vulcan” nods to Roman fire mythology, while “Haestus” echoes Hephaestus, the Greek forge god—apt for one weaponizing Burnish lives.