Alvarto Exex stands as one of the Four Heavenly Kings serving the Demon Lord Varvatos, recognized as the most formidable in combat prowess within this elite group. His history spans over 3,000 years, originating in the ancient era alongside Varvatos and the other Heavenly Kings. Following Varvatos's reincarnation into the modern era as Ard Meteor, Alvarto reemerges, positioning himself as a secondary antagonist driven by unresolved ambitions toward his former leader. A battle maniac, Alvarto harbors a deeply obsessive fixation on confronting Varvatos in a definitive supreme battle, stemming from a prior defeat. This fuels both a twisted reverence and an unrelenting desire to orchestrate a rematch under conditions of absolute strength. His psychological complexity blends mental instability with strategic cunning, making him a master manipulator capable of exploiting others' vulnerabilities, demonstrated through his manipulation of figures like Lizer Bellphoenix and Sylphy Marheaven. Physically, Alvarto is a tall adult male with distinct maroon or violet hair extending to hip length and golden-yellow eyes. He typically wears a red-and-white outfit accented with gold trim, complemented by thigh-high high-heeled boots and occasionally a capelet. He lost an arm in a confrontation with Ard, though this injury was later remedied through unspecified means. Alvarto's abilities center around formidable magical prowess befitting his status as the Heavenly Kings' strongest weapon, though specific spells remain undefined. His combat approach prioritizes overwhelming force. Throughout the series, his actions persistently challenge Ard and the central narrative, reflecting his unwavering commitment to provoking the ultimate battle he seeks against his former master.