Kyoka Jiro, also known as the Hearing Hero: Earphone Jack, is a student in Class 1-A at U.A. High School, training to become a Pro Hero. Kyoka's Quirk is that she has a pair of headphone jacks hanging from her earlobes. When the jacks are plugged into something, Kyoka can channel the sound of her heartbeat into it in the form of a violent vibration attack. She can stretch her earlobes several meters. This Quirk also allows her to hear minuscule sounds and vibrations from her surroundings.