Heartbeat Fuzz[1] is a move performed by Kyoka Jiro using the Earphone Jack Quirk.


Kyoka plugs her jacks into an amplifier, which amplifies the sound of her heartbeat into a destructive force strong enough to shatter rock.[2]

During the Hero License Exam, she wears two amplifiers on her wrists, which increase her destructive output.[1]


  1. 1.0 1.1 Boku no Hero Academia Manga: Chapter 104, Page 4
  2. Boku no Hero Academia Manga: Chapter 16, Pages 7-8

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