Ken Takagi, operating under the hero alias Rock Lock, is a Pro Hero distinguished by his pragmatic approach and forthright manner. Sporting dark, tightly coily hair in a short afro, his signature look includes padlock earrings and fingertips shaped like key teeth. His costume—a green-and-yellow bodysuit adorned with keyhole motifs—is accented by a yellow eye mask and a red necklace strung with keys. Merging sharp critique with a protective streak, Rock Lock’s demeanor stems from his role as a father to an infant son, fueling his initial skepticism toward involving student heroes in the perilous Shie Hassaikai operation. Though his blunt confidence sometimes veers into arrogance—evident in his challenge to Sir Nighteye’s strategic foresight—he pivots to respect after observing their capabilities, balancing tactical precision with steadfast loyalty during combat. His Lock Down Quirk freezes non-living objects in place upon contact, anchoring them temporarily unless overcome by extreme force. The Ultimate Move *Deadbolt* reinforces his vicinity through a sweeping 180-degree hand motion, while a customized tile locked midair serves as an improvised aerial platform for mobility. A married father—his wife four years younger—Rock Lock’s familial bonds amplify his protective instincts. During the Shie Hassaikai mission, he scouts yakuza territories, counters Mimic’s labyrinthine Quirk with Deadbolt, and survives an ambush by Himiko Toga, who exploits his blood for shapeshifting. Injured yet resolute, he insists his team prioritize rescuing Eri over aiding him, later recuperating in the hospital surrounded by family. Later participating in the Hero Billboard Chart JP—where he critiques Hawks’ casual attitude—Rock Lock joins the assault on Jaku General Hospital amid the Paranormal Liberation War. Engaging Nomu and aiding in subduing High-End Nomu, he narrowly evades Shigaraki’s decay wave by fleeing atop Ryukyu’s dragon form. He subsequently bolsters defenses and administers first aid alongside Eraser Head during Shigaraki’s onslaught. In *Heroes: Rising*, he pursues the League of Villains until Dabi targets his transport; deploying Deadbolt to halt its midair collapse, he regretfully concedes limited capacity to assist further. His arc underscores tactical ingenuity fused with paternal drive, showcasing adaptability under duress and evolving respect for emerging heroes.