Tanktop Master holds S-Class Rank 16 in the Hero Association, leading the Tank Topper Army and mentoring heroes such as Tanktop Tiger and Tanktop Black Hole. His formidable abilities stem from the symbolic power of his signature tanktop, which he credits for augmenting his strength, versatility, and resilience. Demonstrations of his exceptional physical power include halting a giant mecha with sheer arm strength and completing over 69,000 consecutive squats. His combat arsenal features the Tanktop Tackle, Tanktop Blow, and the Tanktop Punch—a technique purportedly doubling his striking force through the garment's inherent versatility. During the Alien Conquerors Arc, he attended the S-Class meeting, vaguely recognizing Saitama's name. He attempted to aid Tatsumaki against an alien spaceship but withdrew upon grasping the disparity in their power. In the Hero Hunt Arc, he confronted Garou alongside his subordinates and Mumen Rider. Initially gaining the upper hand, he landed blows that sent Garou flying before the latter could react. However, Garou's Water Stream Rock Smashing Fist technique countered Tanktop Master's raw strength, breaking his arms and securing victory. Throughout this battle, Tanktop Master displayed concern for his injured comrades. Hospitalized with Mumen Rider, he discussed Garou's fluid combat style with Saitama, observing its effectiveness against standard hero tactics. When the hospital faced attack by Gyoffrey of the Monster Association, he saved Mumen Rider, obliterating the monster with a Tanktop Tackle despite his own injuries. He later joined the raid on the Monster Association headquarters in Z-City, hurling a transmission tower and riding its cable to travel there. Buffed by Fubuki's psionic enhancements during the battle, he hurled multiple boulders and an entire multi-story building at the fused entity Psykos-Orochi. He further intercepted energy blasts targeting Tatsumaki with precisely thrown debris. Engaging Monster Association executives, he dodged Homeless Emperor's energy attacks and twice resisted the crushing jaws of Gums before being swallowed. Rescued by Bang tearing through Gums' stomach, he appeared lifeless until Silver Fang and Genos attempted resuscitation. Removing his tanktop caused it to snap back, restarting his heart via what he termed "Tank Top Magic." Fubuki later healed him using life energy transferred from Bomb, restoring his mobility. Subsequently, he carried multiple injured heroes, including Superalloy Darkshine and Puri-Puri Prisoner. His chivalrous nature surfaces when intervening to protect others irrespective of rank, exemplified by insisting on aiding Tatsumaki. He openly concedes defeat when outmatched, resolving to "start from square one" after witnessing superior powers to encourage self-improvement. His leadership extends to recruiting heroes into the sizable Tank Topper Army, rivaling groups like the Blizzard Group. In later confrontations, such as against the Dragon-level Heavy Smoker, he prioritized civilian safety, attempting to absorb poison at personal risk before Flashy Flash intervened. He recovered swiftly after hospitalization.