Itsuka Kendo is a high school student in Class 1-B at U.A. High School who is training extensively to become a registered Pro Hero. Physically, Itsuka is a tall young woman standing at exactly 166 centimeters (about 5 feet 5 inches) tall. She possesses a remarkably athletic, strong, and highly conditioned body shape that is perfectly built for close-quarters physical combat and martial arts. She has a fair complexion and sharp, elegant, yet highly welcoming facial features. Her hair is a vibrant ginger-orange color, styled long and uniquely gathered into a thick, high ponytail that rests prominently on the left side of her head, with a single large, face-framing bang draping loosely over her forehead. She has exceptionally large, expressive, and slightly slanted eyes with bright, striking turquoise-green irises and long eyelashes. Her facial expressions under normal conditions carry a calm, confident, and highly pleasant composure, radiating an aura of natural maturity and friendliness. Her physical presence is marked by a perfectly straight, proud posture and deliberate, sharp movements that convey her deep background in hand-to-hand combat training, making her a highly steady anchor for those around her. Her supernatural physiological trait is a Transformation-type attribute known simply as Big Fists. This biological anomaly operates directly through her upper limbs, granting her the unique power to voluntarily expand both of her hands to a massive, gargantuan size. When activated, her hands and fingers multiply in mass and volume, growing large enough to completely dwarf a full-grown human being or block wide corridors. This physical transformation grants her immense, superhuman kinetic strength and striking power, allowing her to easily crush solid stone blocks, deflect incoming artillery fire, or generate powerful shockwaves by clapping her oversized palms together. She can also use her giant hands defensively as physical shields to protect her teammates or offensively to scoop up and pin multiple opponents down simultaneously. However, her trait features a strict set of biological and physical limitations during her first year. The expansion applies exclusively to her hands and wrists, meaning her forearms and shoulders remain their normal human size, which requires immense joint stability and core strength to manage the massive shift in weight distribution. Furthermore, maintaining the enlarged state places a heavy tax on her physical stamina and muscle walls; over-expanding her hands during prolonged combat causes rapid muscle fatigue and cramping, requiring her to deactivate the power to let her hands shrink back to normal human proportions to recover. Her personality is exceptionally rational, spirited, and deeply supportive, serving as a reliable, natural leader and the undisputed "big sister" figure of Class 1-B. She is an incredibly level-headed, smart, and responsible individual who approaches life with a cheerful, down-to-earth kindness, making it easy for her to unite diverse personalities and maintain peace within her classroom. Itsuka possesses a sharp, brilliant tactical intellect and an elite capacity for battlefield management, allowing her to analyze complex enemy formations on the fly and formulate successful team strategies under extreme pressure. She is fiercely independent and highly mature, never hesitating to physically restrain or forcefully chop her more obnoxious classmates on the head whenever they act up, behave petty, or attempt to instigate unnecessary drama with other classes. She harbors a modest, completely unpretentious mindset, actively preferring to uplift the confidence and accomplishments of her peers rather than seeking the spotlight for herself. Beneath her gentle, bright, and often big-sisterly exterior lies a deeply brave, resolute, and unyielding heroic heart. When sudden crises emerge or villains ambush her group, she sheds her relaxed demeanor completely, replacing it with an admirable, fearless focus. She willingly places her own body and stamina directly in harm's way, utilizing her martial arts expertise and physical power to act as a reliable, comforting shield to safeguard her companions.