The main character of the series, who despite her name and appearance, is very inexperienced and innocent, and gets easily embarrassed over her physique and what she says, as she sometimes accidentally says suggestive stuff. She has difficulty waking up early, but becomes more active as the day passes. She is also very emotional and becomes easily involved when reading books or watching movies, to the point of crying. She enjoys cooking, and usually makes her own bentos, and can even make bread. She is also terrified of body modifications such as piercings, despite having earrings. She also has an older sister, with whom she often exchanges clothes, including her school uniform; she gets angry, however, after finding out just what her sister does with it. Her name refers to gyaru subculture in Japan.

The anime follows the everyday lives of three high school girls who are close friends: Galko, Otako, and Ojou. Galko is a slightly foul-mouthed but good-natured girl who is popular in her class. Her hobby is film appreciation. Otako is a girl who sits in the corner of the classroom, but for some reason is good friends with Galko. Ojou is an airheaded girl who often talks with Galko and Otako. 
 
Each of the girls' names refers to their type. Galko is a pun on gyaru or gal, which is a term used to describe a type of street fashion where women in their teens and 20s bleach their hair and wear highly decorated nails and a lot of makeup. Otako is a pun on otaku, and Ojou refers to a girl who is a daughter of a high-class family. 
 
(Source: Anime News Network)

__Hobbies:__ Games, eating, tennis, swimming

[Website](https://columbia.jp/wakiazumi) | [Talent Page](https://haikyo.co.jp/profile/profile.php?ActorID=12722) | [Twitter](https://twitter.com/azumi_waki) | [Instagram](https://www.instagram.com/ajujustaff) | [Instagram (Personal)](https://www.instagram.com/azumi_waki)

On August 10, 2023, she announced on Twitter her marriage to her longtime partner met through a shared hobby of gaming.

**Non-Anime Roles:**
~!
• Charlotte (Genshin Impact)
 • Mem (Honkai: Star rail)!~

Galko-chan always speaks her mind, which may not be the wisest decision in all cases, but it’s never short of entertaining! Follow the exuberant and unbelievably busty high schooler as she traverses the ups and downs of adolescence with spirit and verve, alongside her best friends–the anti-social loner, Otako, and the unpredictably honest Ojou.
 (Source: Seven Seas Entertainment)
 
Notes: 
- Includes 9 extras chapters from the volume release. 
- Serialization of this series was suspended on December 24, 2021 following the mangaka's arrest.

Oshiete! Galko-chan OVA bundled w/ LE manga vol.4