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Yotsuba Koiwai

Yotsuba Koiwai is a fictional character and the main protagonist of Kiyohiko Azuma’s manga series *Yotsuba&!*.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Yotsuba Koiwai is a fictional character and the main protagonist of Kiyohiko Azuma’s manga series *Yotsuba&!*. She is depicted as a five-year-old girl whose curiosity, energy, and frequent misunderstandings drive the comic’s everyday stories. She lives with her adoptive father, Yousuke Koiwai, and her design includes green hair worn in four pigtails.

Character overview

Yotsuba Koiwai is the protagonist of *Yotsuba&!*, a slice-of-life comedy manga by Kiyohiko Azuma. The story follows her daily activities and childlike interpretations of ordinary events.

Appearance and personality

Yotsuba is commonly described as a small five-year-old girl with green hair styled in four pigtails. Her personality is defined by high energy, enthusiasm, curiosity, and innocence; she is portrayed as cheerful, energetic, curious, and naïve.

Publication history

Yotsuba first appeared in *Try! Try! Try!*, an earlier one-shot/webcomic project by Azuma. The character was later developed into the lead of *Yotsuba&!*, which began serialization in 2003.

Role in the manga

Most chapters center on Yotsuba encountering a new situation, activity, or idea and reacting in a humorous or literal way. Her interactions with her father, neighbours, and friends provide the basis for the series’ episodic structure.

Key facts

  • Yotsuba is the title character and central focus of *Yotsuba&!*.
  • She is portrayed as cheerful, energetic, curious, and naïve.
  • The character first appeared in the earlier one-shot and webcomic material *Try! Try! Try!*.
  • She lives with her adoptive father, Yousuke Koiwai, in the series.
  • Her design includes green hair worn in four pigtails, which references the meaning of her name.

Frequently asked questions

Who created Yotsuba Koiwai?
Yotsuba Koiwai was created by manga artist Kiyohiko Azuma.
What manga is Yotsuba Koiwai from?
She is the main character of *Yotsuba&!*.
How old is Yotsuba Koiwai?
She is portrayed as five years old.
What is Yotsuba Koiwai’s personality like?
She is depicted as energetic, cheerful, curious, and naïve.
When did Yotsuba first appear?
Her earliest known appearance was in *Try! Try! Try!* in 1998.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Yotsuba_Koiwai
    Supports: Character identity, Japanese name, role in Yotsuba&!, personality, and first appearance in Try! Try! Try!.
  2. Wikipediahttps://en.wikipedia.org/wiki/Yotsuba&!
    Supports: Series title, creator, serialization start, premise, and Yotsuba’s age and role.
  3. Wikipediahttps://en.wikipedia.org/wiki/List_of_Yotsuba&!_characters
    Supports: Yotsuba’s age, orphan/adoption background, meaning of the name, and green pigtail design.