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Yui Kodai presses her five fingertips together and whatever she is touching grows or shrinks, glowing pink while it happens. Size is quiet, precise, and strictly limited to objects, so nothing living ever changes under her hand.

Quirk Type: Emitter
Quirk Range: Contact
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Overview

Size is the emitter Quirk used by Yui Kodai of Class 1-B. It functions on contact, debuting in Chapter 210 and animated in Episode 98.

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Mechanics

Anything the user touches can have its dimensions rewritten, scaled up or down at will. Yui brings the power online only by pressing all five of her fingertips against one another, a detail put on display throughout the Joint Training Battle. Whatever she has affected takes on a pink glow.

One restriction stands in the way. Living things are immune, so the Quirk never works on people or animals.

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Notable Users

Yui Kodai is the sole known user. Her activation gesture mirrors Ochaco Uraraka's Zero Gravity, which likewise depends on all five fingertips, and both girls tend to say "release" when undoing the effect, though for Ochaco that word doubles as the name of an Ultimate Move. The resemblance is likely a nod to Yui's design originating in Ochaco's prototype artwork. A student in red attending Seijin High School produces comparable effects, with no apparent connection between the two characters.

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Frequently Asked Questions

Who uses the Size Quirk in My Hero Academia?

Size is the Quirk used by Yui Kodai of Class 1-B. It is an emitter-type ability that functions on contact.

How does the Size Quirk work?

Yui Kodai activates the Size Quirk by pressing her five fingertips together, letting her grow or shrink whatever she touches. The affected object glows pink while its dimensions change.

Can the Size Quirk affect people or animals?

No, the Size Quirk only works on objects. Living things are immune to its effects.

How is Yui Kodai's Size Quirk similar to Ochaco Uraraka's Zero Gravity?

Both Quirks are activated by pressing all five fingertips together, and both users say release to undo the effect. The resemblance likely comes from Yui Kodai's design originating in an early prototype of Ochaco Uraraka's character.

When did the Size Quirk first appear?

The Size Quirk debuted in Chapter 210 of the manga and was animated in Episode 98, during the Joint Training Battle arc.

Sources & Information

Looking for more on Size? The My Hero Academia Wiki on Fandom has a dedicated page with community notes.

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This content is original writing by Daddy Jim Anime based on the My Hero Academia anime series, manga, and official materials. My Hero Academia was created by Kohei Horikoshi, published by Shueisha, and animated by Bones. All rights to My Hero Academia and its characters belong to their respective owners. Episode and chapter references are cited where applicable.

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