Superalloy Blackluster, initially known as Superalloy Darkshine, holds the 11th rank among the S-Class heroes of the Hero Association. His physique showcases a powerfully muscular frame, bald scalp, and gleaming obsidian skin—a striking transformation caused by years of extreme bodybuilding. Previously lighter-skinned and haired, his rigorous training regimen permanently darkened his pigmentation and caused complete hair loss, as detailed in his origins. Renowned for unparalleled durability and crushing physical might, he dominates in close-quarters combat. His signature feats include withstanding lethal assaults unharmed and delivering fight-ending blows, exemplified by his effortless obliteration of the monster Destrochloridium. A hallmark of his personality is an intense vanity; he habitually seeks admiration for his sculpted form and obsessively compares his "shine" to others’ appearances. In the Monster Association conflict, he confronts high-ranking executives but faces a pivotal collapse when Golden Sperm psychologically overwhelms him. This defeat erodes his self-assurance, triggering a withdrawal from heroics as he grapples with profound doubt. Later, he transitions to mentoring recruits within the Neo Heroes, channeling his experience into instruction rather than direct combat. This shift underscores his effort to redefine himself beyond mere physicality. Ancillary appearances include the *Zombieman Murder Case 2* OVA, where he aids in subduing the monster Bruinado and probes a lodge’s blackout mystery. His teamwork with figures like Speed-o’-Sound Sonic reveals a cooperative nature tinged with lingering self-consciousness during collaborations.