Kosei Tsuburaba

Kosei Tsuburaba also known as Tsuburaba (ツブラバ), is a student in Class 1-B at U.A. High School, training to become a Pro Hero.

Appearance
Kosei is a young man with short brown hair, spiked up at odd angles on his head. His eyes are oval-shaped, along with his large pupils.

His hero costume consists of a simple light blue jacket, with pale pants, a black shirt underneath, and he wears large brown boots with cylindrical shapes on the soles.

Personality
Kosei is a very enthusiastic and competitive individual who holds himself to a high standard as he makes an effort to avoid descending to the level of his rivals.

However, Kosei was not above taunting Katsuki Bakugo himself after stopping the Class 1-A student with his Quirk. Similar to Neito Monoma, Kosei has no problem settling for less rather than aiming for the top.

He seems to have a subtle yet rather lecherous side, which is demonstrated in how he was mostly thinking about how Tsuyu Asui's tongue was wrapped around him when he was captured.

Quirk
Solid Air: Kosei's Quirk allows him to solidify any air he breathes out, allowing him to create invisible walls and/or platforms. The solidified air continues to stay afloat in midair, even if someone is standing on it. The size of the wall or platform depends on his lung capacity.

Initially, these walls and platforms were not very strong, as Katsuki was able to break an air wall as if it were made out of glass using only his bare fist, uninjured. Later on, he improved his Quirk and his air walls were strong enough that it required hitting them with metal pipes repeatedly to break them.

The solidified air is also became soundproof later on (Air Prison), restricting communication and making it effective against Quirks that rely on sound, such as Anivoice or Brainwashing.

Super Moves

 * Air Prison (エアプリズン): Kosei refined his Quirk since the Forest Training Camp Arc, and is able to send out squares of air, and shape them into a box to imprison his opponent. The fact that Koji Koda was imprisoned there for a while and Jurota Shishida had problems containing Koji's strength shows that these air prisons are much more durable than solid air he has shown previously. He displays this ability in the first round of the Class 1-A vs. Class 1-B training event.

Chapter Appearances

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Anime Appearances

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Trivia

 * Kosei's surname contains the kanji for "yen, circle" (円) and "place" (場), and his first name contains "hardness" (硬) and "formation, to become" (成).
 * Kosei is the only character in the main series so far to receive more than one volume character profile.
 * Kosei likes ball games.
 * Kosei likes any kind of live-action television that features superheroes and makes considerable use of special effects.
 * Kosei's first English voice actor, Aaron Dismuke, also voices Tamaki Amajiki. His second English voice actor, Nazeeh Tarsha, also voices Elecplant and Daigo.

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