Yui Kaoru
Seidou High School - No. 20
Bats: Left Throws: Right
Kanji 由井 薫
Gender Male
Age 15 (debut)
Education 1st Year High School
First Appearance
Manga Act II - Chapter 1
You are a tough one!
Sawamura to Yui

Yui Kaoru is a student of Seidou High School and roommates with Furuya Satoru and Ono Hiroshi.


Yui is a short boy with light brown hair, thick eyebrows, big eyes, and is often seen wearing a smirk on his face.


Yui is a confident teenager having a very competitive spirit. He hates to lose specially to his similarly competitive teammates whether it be at running laps, batting or simply eating meals.


He was the unshakable starting catcher in the Mamiya Senior League, and is a known prodigy in his generation who captained the Japanese Representative team in the Little League World Series.

Act IIEdit

Arriving early at Seidou, Yui have a brief encounter with Okumura, Seto and Yuuki after which, he heads to the dorms. In the dorm room, he tells Furuya to feel free to call him anytime Furuya feels like pitching for he is a catcher and admits that he's been interested to see Furuya's pitches for the longest time.

Spring TournamentEdit

Yui watches Seidou's third round match against Eigen from the bleachers. He makes it to the first string and observes how Miyuki lead Furuya in the fourth round. Later at the Seidou dorm, Sawamura asks Miyuki to catch for him but Yui is quick to volunteer instead as he found it difficult to catch Sawamura's pitches at the bullpen.

After Seidou's quarterfinals match victory, Yui offers to catch for Furuya knowing that Furuya isn't satisfied pitching in the quarterfinals.[1] Furuya declines Yui, prefering to have Miyuki catch for him instead, to Yui's surprise. Furuya says that he wants to pitch at ease without holding back. Yui then feels frustrated, clenching his fists while thinking back during practice that he's had a hard time catching Furuya's pitches.[2]

Relationship with other charactersEdit

Furuya SatoruEdit

He highly respects[3] the ace of the team, who is also his roommate and eagerly wants to catch for him, because he's interested in seeing Furuya's pitches up close.

Sawamura EijunEdit

He is also interested in Sawamura's pitches and wants to catch for him as soon as an opportunity arises because he had troubles catching his pitches the first time.[4]


Yui has power, good running, and an excellent shoulder.

Trivia Edit

  • Yui is one of the few freshmen who can easily scarf down breakfast and is always first.

Name EtymologyEdit

  • Yui (由井) - Well of Reason
  • Kaoru (薫) - Fragrant


  • "If they are serious about the national championship, they'll need this pitcher." - about Sawamura
  • "I can't help wondering just what kind of fastball he throws." - about Sawamura [5]


  1. Act II - Chapter 31
  2. Act II - Chapter 32
  3. Act II - Chapter 12
  4. Act II - Chapter 23
  5. Act II - Chapter 13


Start a Discussion Discussions about Yui Kaoru

  • The best Seidou battery would be ...

    7 messages
    • I easily agree with everyone here ChrisxEijun, MiyukixEijun and KoushuuxEijun are the top.  Anyway, I'll use this opportunity to ran...
    • honestly for me, it would be miyuki and eijun flat-out. In my opinion Miyuki is the best catcher, and even though I love Chris (though not...

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