Natsukawa Yui
Seidou High School
Bats: Throws:
Kanji 夏川 唯
Gender Female
Age 16 (debut)

17 [1]

Date of birth 13 August
Height 157 cm
Weight 44 kg
Education 2nd Year High School (debut)

3rd Year High School [2][3]

First Appearance
Manga Act I - Chapter 7
Anime S1 - Episode 4
Voice Actor Takahashi Karin

Natsukawa Yui is a student of Seidou High School and one of the managers of the Seidou Baseball club.


Yui has light brown hair, which she wears short.

Relationship with other charactersEdit

Umemoto SachikoEdit

Sachiko and Yui know each other well and joined the baseball club together. They are in the same year of high school. Yui knows that she can rely on Sachiko and vice versa. They trust each other blindly regarding their work as team manger.

Fujiwara TakakoEdit

Takako is Yui's reliable upperclassman. It was a tearful farewell when Takako and the other third years retired.

Yoshikawa HarunoEdit

Haruno is a fellow manager and one year younger then Yui and Sachiko, and thus their kōhai.[4] But Haruno is very clumsy. As a result of her clumsiness, she often makes more work for her seniors, which leads to them getting angry sometimes. But after some initial difficulties they get to know each other really well and start to work together as reliable teammates.


  • Yui and Takako call Sachiko “Sacchin”.

Name EtymologyEdit

  • Natsukawa (夏川) - Summer River
  • Yui (唯) - Only; Common



  1. Acr I - Chapter 201
  2. Act I - Chapter 412
  3. Act II - Chapter 1
  4. In Japan, kōhai (後輩) is a junior.