Kyoka Jiro (耳じ郎ろう響きょう香か Jirō Kyōka?), also known as the Hearing Hero: Earphone Jack (ヒアヒーローイヤホン＝ジャック Hia Hīrō Iyahon Jakku?), was a student in Class 1-A at U.A. High School, training to become a Pro Hero. Eight years after the Final War, Kyoka has graduated from U.A. alongside her classmates, and is currently the No. 30 Hero.[4] She has also become a musician and Eri's mentor.[5]