Kaoru has long light-brown hair that has bangs swept to the left side and light-brown eyes.
Kaoru is a laid back young man who can be serious when it comes to his feelings for Nozomi Onda.
Kaoru and Tetsuji Yamada are childhood friends who play football together. They met Nozomi Onda in elementary and asked her to join them in a junior football league. The three friends went on to attend Fuji Daiichi Middle School together.
Kaoru serves as a forward in the Fuji Boys soccer team. He supports Onda's efforts to be picked by the coach to play in the newcomers' tourney. When he realizes that Nozomi took Junpei's place in the newcomers' tourney, he becomes worried for her because she can get hurt.
In the anime, he watched the Warabi vs. Kunogi practice match. After the Warabis faced Kunogi, he makes a comment on how the girls did, unaware of how they really feel. At the stadium that held the Saitama Preliminaries, he was in the audience along with Yasuaki Tani, Tetsuji Yamada and Junpei Onda.
They were teammates in the Fuji Boys Soccer Team.
They were teammates in the Fuji Boys Soccer Team.They played soccer when they were kids. He has an unrequited crush on her.
Kouzou was Kaoru's coach in the Fuji Boys Soccer Team.
- The name Kaoru means "fragrance, fragrant" (薫).
- Kaoru's surname Takei means "bamboo" (竹) (take) and "well, mine shaft, pit" (井) (i).
- Kaoru appears to love soaking up in the spotlight.
- Kaoru shares the same voice actor with Keiji Akaashi from Haikyu!! and Marco Bodt from Attack on Titan.