Mezo Shoji exhibits a heteromorphic physique defined by six powerful arms linked by membranous webbing, pale gray hair obscuring much of his face, and an elongated jawline. Facial scarring prompted him to permanently adopt a distinctive blue mask after his unmasked features—including an extended mouth with prominent teeth and absent nasal structure—frightened a young child. This decision stemmed from a desire to prevent distress, not to retaliate against lifelong bigotry targeting heteromorphs like himself. Growing up amidst relentless prejudice, Shoji faced assaults and slurs labeling his blood "unclean." A formative childhood incident shaped his worldview: villagers scarred him after he rescued a drowning girl with his tentacles, misinterpreting his actions. Her subsequent remorse and gratitude became his sole positive bodily memory, fueling his heroic resolve. He pursues systemic change for heteromorph acceptance through gradual societal progress rather than violent upheaval. His Quirk, Dupli-Arms, sprouts tentacles from his shoulders that transform into enhanced sensory organs (eyes, ears, mouths) or supplementary limbs. These duplicated senses surpass human limits—auditory detection pinpoints invisible foes, and visual range expands dramatically. Physical prowess includes crushing strength (540 kg grip), rapid evasion (outpacing Dark Shadow while injured), and stamina (sustained sprints against Pony Tsunotori). Super Moves like Octoblow unleash defensive or offensive limb barrages. Severed limbs regenerate despite causing pain. At U.A. High, Shoji placed 6th in the Quirk Apprehension Test and 10th academically. Notable engagements include: - USJ Incident: Located classmates via amplified hearing and shielded Tenya Ida during reinforcement retrieval. - Forest Training Camp: Sacrificed a tentacle to Moonfish, then saved Izuku Midoriya from Dark Shadow while analyzing Fumikage Tokoyami’s emotional Quirk influence. - Pro Hero naming: Assigned "Tentacle Hero: Tentacole." - Joint Training Battle: Deflected Tsunotori’s horns and partnered with Mashirao Ojiro against Class 1-B. - Work Studies: Honed reconnaissance under Gang Orca’s mentorship. During the Paranormal Liberation War, Shoji defended Jaku Hospital against Spinner’s heteromorph faction. Rioters ripped off his mask, denouncing him as a traitor for opposing their cause. He condemned their endangerment of innocents, asserting societal grievances couldn’t justify violence. This confrontation solidified his belief in heroism as a catalyst for incremental heteromorph integration. Post-war, Shoji graduated U.A. and attained the No. 9 Hero ranking within eight years. Awarded the Imamura Peace Prize for advancing societal equality, he grew taller and more muscular, styling his hair in a ponytail while retaining his mask. His career realized the goal of forging "good memories" for future heteromorph generations.