Kyoka Jiro, a U.A. High student training as a Pro Hero, possesses a petite, fair-skinned frame accentuated by triangular onyx eyes, long lower eyelashes, and subtly arched eyebrows. Her dark purple hair falls chin-length with an asymmetrical fringe, two sound wave-shaped streaks framing her face. Flexible, plug-like earphone jacks coil from her earlobes, their length adjustable at will. Her hero costume merges practicality with edge: a black leather jacket layers over a long salmon shirt with frayed collar and hem, paired with black pants and boots embedded with stereos. White fingerless gloves, a plain black choker, and twin triangular red marks beneath her eyes complete the look. An updated design incorporates headphones, amplifier bracelets, and chevron-shaped face paint. Daughter of musicians Kyotoku and Mika Jiro, she cultivated an early passion for music, mastering multiple instruments. Though her parents’ world revolved around melodies, she chose heroism to protect others—a path they endorsed without hesitation. Kyoka navigates life with dry pragmatism, readily teasing peers who test her patience. Yet her sociable nature fosters bonds, particularly with Momo Yaoyorozu. Elongated earlobes often substitute gestures, while her Earphone Jacks double as disciplinary tools when provoked. A strategist at heart, she approaches hero work with methodical precision, concealing self-consciousness beneath a tough exterior. Her empathy surfaces in quieter moments, and her love for rock music fuels skilled bass guitar performances. Her Quirk, Earphone Jack, morphs her earlobes into malleable conduits that transmute her heartbeat into destabilizing vibrations. She extends these jacks meters to detect faint sounds or whip adversaries into submission. During the Provisional Hero License Exam, she redirected vibrations through the ground, generating seismic disruptions. Interning under Gang Orca refined her acoustic reconnaissance. On Nabu Island, she and Mashirao Ojiro ambushed the villain Nine, though his Hydra Quirk overpowered them. Her evolving tactics have garnered Pro Hero attention, unlocking advanced training avenues. When Nine threatened Nabu Island, Kyoka’s strategic Quirk application and musical intuition fortified her team’s defense, safeguarding civilians amidst chaos.