Kyoka Jirou is an adult Pro Hero operating at an elite level of public safety, widely celebrated for her advanced acoustic reconnaissance, battlefield coordination, and sonic containment. Physically, she is a fully grown woman in her mid-twenties who stands at exactly 154 centimeters tall. Over the course of the timeskip, her once slender frame has filled out, adding a remarkably lean, agile, and well-conditioned athletic musculature across her core, arms, and legs. This dense physical structure provides enhanced joint stability, allowing her skeletal framework to safely absorb severe environmental vibrations. She has a fair, slightly pale complexion and a highly structured, mature jawline. Her hair is a deep, dark purple-indigo color, cut into an asymmetrical, messy bob with a jagged fringe of straight-cut bangs draping across her forehead. A highly notable physical characteristic is the unique pattern on her strands, where light reflects to resemble the lines of an electronic audio waveform. She has large, slanted eyes with dark, triangular pupils. Her appearance bears a permanent, historic reminder of the war: she is missing her entire left earlobe and its attached prehensile appendage due to a severe injury suffered during the final battle. Her remaining right earlobe features her unique biological hallmark—a long, flexible prehensile cord resembling an auxiliary headphone jack, moving completely under her voluntary motor control. Her base facial expressions have evolved from a bored pout into a calm, deeply focused, and seasoned gaze that radiates a quiet, unshakeable confidence. Her supernatural physiological trait is a Mutant-type attribute known simply as Earphone Jack. This anomaly operates directly through her auditory and nervous systems, utilizing the flexible auxiliary jack extending from her right earlobe alongside her body's internal rhythmic frequencies. Kyoka can plug her flexible cord into any solid surface to channel the roaring acoustic vibrations of her own heartbeat into the environment. When plugged in, her heartbeat amplifies to a devastating volume, producing powerful, localized sonic shockwaves capable of shattering reinforced concrete and blowing back opponents from a distance. Her jack also operates as an advanced, highly sensitive organic radar; by inserting the plug into floors or walls, she can catch microscopic sound frequencies, tracking the exact footsteps, movements, and vocal vibrations of targets across vast distances. Following the loss of her left jack, her remaining right line has undergone a neural adaptation, allowing her to process radar telemetry with heightened precision to compensate for the missing limb. However, her trait still operates under strict biological limits. Because her power is directly tethered to her neural auditory pathway, over-amplifying her acoustic output inflicts excruciating sonic feedback on her remaining eardrum, causing temporary dizziness and auditory fatigue. Her personality is exceptionally cool, easygoing, and intensely pragmatic, serving as a celebrated pillar of emotional comfort, rational focus, and strategic leadership within the hero community. The old teenage insecurities and crippling anxieties regarding her slender appearance or artistic passions have completely washed away following her contributions during the war, replaced by a profound sense of inner peace and absolute self-worth. She has fully embraced her identity as both an elite musician and a top-tier Pro Hero, utilizing her passion for rock music to inspire hope. Kyoka is a direct, dry-witted individual who has matured into an exceptional agency leader, capable of managing chaotic battlefield communication and keeping her team perfectly grounded under pressure. She possesses a sharp tactical intelligence and an unmatched capacity for strategic observation, utilizing her sonic radar to coordinate complex rescue maneuvers with absolute precision. Beneath her edgy, rock-inspired exterior lies an intensely sensitive, deeply empathetic, and fiercely loyal heart. When catastrophic disasters or dangerous threats place innocent lives in jeopardy, her casual demeanor vanishes completely, replaced by an absolute, unbreakable willpower and an admirable, fearless focus. She never hesitates for a single second, willingly placing her biological stamina and physical safety on the line to act as a reliable, comforting shield to safeguard her companions, protect the innocent, and foster long-term peace.