Yui is a young girl with shoulder-length, bob-shaped hair, side-swept to her right with some shorter strands hanging above her eyes. She has fair skin, an athletic build, cerulean eyes, and she's usually seen wearing a neutral expression on her face.
Her hero costume consists of a simple red bodysuit with a white-collar trim, a matching ”V” pattern running over her chest and around her upper arms, which also includes a short white skirt with a red design at the front, dipping so it follows the one in her chest. She wears plain vambraces, as well as a hat which resembles the front of a baseball cap, colored red with white U-shaped lines around the sides, with a metal piece resembling a fin attached at the back of the strap around her head.
She has a belt at her waist and straps around her shoulders, what appears to be an oval-shaped gemstone set between them on her chest, each adorned with a small pouch, containing the various nuts, bolts and all of the other small metal pieces she likes to use with her Quirk.
Yui is a quiet girl that rarely expresses any emotions; some of her classmates even consider her a kūdere. Despite her silent demeanor, Yui has shown to care for her classmates, most prominently during the Forest Training Camp Arc, when she looks after Juzo Honenuki and Ibara Shiozaki after they get knocked unconscious by Mustard's poisonous gas.
Although she rarely talks and has no expression, Yui isn't moody. When she's happy, she says 'Mm!' When she eats her favorite tomatoes, she says 'MM!'
Battles & Events
|Battles & Events|
- Her concept is derived from Ochaco's prototype appearance and similar name and Quirk.
- Her name contains the kanji for "small" (小 ko?), "big" (大 dai?) and "ordinary" (唯 yui?).
- Yui's rankings on the Popularity Polls are as following:
- Ranked 118th place in the 4th Popularity Poll.
- The crest on the hat of Yui’s hero costume resembles Ultraseven's Eye Slugger. Ultraseven is known for changing in size, which is the same as the effect Yui's Quirk has.
- Her hero costume's color scheme of largely red with silver streaks seems to further this connection. In addition, said costume has what appears to be a homage to the Color Timer, a special organ many Ultras have that can be found either on the sternum or on/around the sternoclavicular joint.
- Yui was unaware that a group of boys formed a fan club for her during her middle school years, even after she graduated.
- Yui also appears to like matryoshka dolls.
- Yui's English voice actor, Madeleine Morris, also voices Komari Ikoma.
- My Hero Academia Anime: Episode 43.
- My Hero Academia: Ultra Analysis: The Official Character Guide.
- My Hero Academia Manga: Chapter 210.
- My Hero Academia Manga: Vol. 22, Omake
- My Hero Academia Manga: Vol. 22.
|U.A. High School|
|Class 1-A Students||Denki Kaminari • Eijiro Kirishima • Fumikage Tokoyami • Hanta Sero • Izuku Midoriya • Katsuki Bakugo • Koji Koda • Kyoka Jiro • Mashirao Ojiro • Mezo Shoji • Mina Ashido • Minoru Mineta • Momo Yaoyorozu • Ochaco Uraraka • Rikido Sato • Shoto Todoroki • Tenya Ida • Toru Hagakure • Tsuyu Asui • Yuga Aoyama|
|Class 1-B Students||Hiryu Rin • Ibara Shiozaki • Itsuka Kendo • Juzo Honenuki • Jurota Shishida • Kinoko Komori • Kojiro Bondo • Kosei Tsuburaba • Manga Fukidashi • Neito Monoma • Nirengeki Shoda • Pony Tsunotori • Reiko Yanagi • Sen Kaibara • Setsuna Tokage • Shihai Kuroiro • Tetsutetsu Tetsutetsu • Togaru Kamakiri • Yosetsu Awase • Yui Kodai|
|Department of Support||Mei Hatsume • Bibimi Kenranzaki|
|General Department||Hitoshi Shinso • Chikuchi Togeike • Tsutsutaka Agoyamato|
|Second Year Students||Mawata Fuwa|
|Third Year Students||Mirio Togata • Nejire Hado • Tamaki Amajiki • Bibimi Kenranzaki • Yuyu Haya|
|Staff||All Might • Cementoss • Ectoplasm • Eraser Head • Hound Dog • Lunch Rush • Midnight • Nezu • Power Loader • Present Mic • Recovery Girl • Snipe • Thirteen • Vlad King • Gran Torino (Retired)|
|Former Students||All Might • Endeavor • Best Jeanist • Midnight • Eraser Head • Loud Cloud • Present Mic • Mister Blaster|
|Locations||Class 1-A • Class 1-B • Conference Room • Ground Beta • Ground Gamma • Ground Omega • Gym Gamma • Heights Alliance • Lunch Rush Cafeteria • P.E. Grounds • Recovery Girl's Nurse's Office • Sports Festival Stadium • Teachers Lounge • U.A.'s Development Studio • Unforeseen Simulation Joint|