Yui Kodai

Yui Kodai (小大唯) is a student in Class 1-B at U.A..

Appearance
Yui has dark, shoulder-length, bob-shaped hair.

Personality
Yui is a quiet girl that rarely expresses any emotions.

Sports Festival Arc
In the Prelimaries Race, she made it to 31st place. Before the Cavalary Battle, she formed Team Kodai with Kojirou Bondo and Manga Fukidashi. As her team goes towards Team Bakugou, Bondo used his quirk to interfere against Team Bakugou. Then after Bakugou takes most of Team Monoma's headbands, her team goes after Team Monoma, but her team goes away from Team Monoma, ending with zero points. Her team fails to advance to the tournament.

School Trip Arc
On the day of the forest lodge trip, when Neito mocks Class 1-A, Yui is seen observing.

When Class 1-B arrives at the training camp, their homeroom teacher Vlad King explains that they will be extending their Quirks and that the more they use their Quirks, the stronger they will be by breaking their limits. When Class 1-B witnesses Class 1-A's training, Itsuka asks Shouta how they can observe everyone, and he explains that is the reason The Pussycats are around. Later that night, Class 1-B act as the scaring group during the test of courage. In the forest, Itsuka and Juuzou commends Yui for scaring Shouto and Katsuki. However, smoke entering the forest knocks out Juuzou. Itsuka takes action and uses her Quirk to cover Yui from the smoke.

Quirk and Abilities
Size (サイズ): Yui can make herself shrink to at least half of Bondo's size. She can also make herself larger, as seen when she tries to scare off Shouto and Katsuki.

Itsuka Kendou
Itsuka protects Yui from the poisonous smoke during the Test of Courage, and also, Itsuka says Yui's given name. This means that Yui and Itsuka are pretty close.

Trivia

 * Her name contains the kanji for "small" (小), "big" (大) and "only" (唯).
 * Yui likes Matryoshka dolls.