Kyoka Jiro

Kyouka Jirou (耳郎響香) is a student at Yuuei training to become a Pro Hero.

Appearance
Kyouka has short black hair with blue highlights and asymmetric bangs. Her most notable feature is her plug-like earlobes which seem to be able to change length. She has so far only been shown wearing the standard Yuuei school uniform and gym clothes.

Her hero costume consists of a black jacket over a long peach colored shirt black pants and boots with stereos in them. She also sports two small red triangle makeup just below her eyes and a plain black choker.

Ultimate Space & Jams Arc
Kyouka is warped to the mountain area of the Ultimate Space and Jams along with Momo Yaoyorozu and Denki Kaminari. Annoyed that Denki is talking too much, she kicks him into one of the villains, causing the villain to be electrocuted by Denki's Quirk. She then uses her Quirk to protect Denki from an attack by one of the villains. Kyouka uses her Quirk to create a soundwave, causing the villains to block their ears in pain, which gives Momo the time needed to create an insulator sheet. Kyouka and Momo hide under the insulator sheet while Denki discharges a great amount of electricity, defeating the villains while Kyouka and Momo remain unharmed. However, one of the villains take Denki hostage, forcing Kyouka and Momo to stop and do nothing. However, the villain holding Denki is shot down, freeing Denki and Kyouka rushes to tie up the villain. She is then seen with her class after the battle with the Villain Alliance is over.

Sports Festival Arc
After Shouta announces that the Sports Festival is approaching, Denki says that he plans to become a professional Heroes's sidekick after he graduates, to which Kyouka states that many people become sidekicks and fail to become real Heroes, to which she thinks that Denki is the kind of person who would become like that, which crestfallens Denki. Kyouka competes in the Obstacle Race where she places 21st, allowing her to compete in the Human Cavalry Battle. She teams up with Rikidou, Kouji and Tooru for the Human Cavalry Battle. When the Human Cavalry Battle begins, Kyouka uses her Quirk to try and grab Izuku's headband, but Fumikage uses his Dark Shadow to block her attack.

Quirk
"Earring Jacks" - She can raise the sound of her own heartbeat but also catch very faint sounds with her plugs.

Battles
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Ultimate Space & Jams Arc
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 * Momo Yaoyorozu, Kyouka Jirou & Denki Kaminari vs. Villains: Win

Denki Kaminari
During the Battle Trial Arc and the Ultimate Space & Jams Arc, they were teamed together. Kyouka is somewhat really rude towards Denki. Whether it's because of her personality or because she just acts like that towards him, is not known yet. However, she does seem to care for him, as he tried to rescue him when he was taken hostage.

Momo Yaoyorozu
During the Ultimate Space & Jams Arc they were teamed together, along with Denki. They seem to have good teamwork.

Trivia

 * She's the student No. 12 in Class 1-A
 * During the Quirk Apprehension Test made by Aizawa, she ranked 17th.
 * She can use her earlobes as earphones.
 * Her name has the kanji "耳" (mimi), which means "ear", and "響" (hibiki), which means "resonance, sound".