Kaori is a character from the anime series about competitive high school soccer. Her full name is Kaori Doumoto. She is an adult female with gray eyes and black hair that reaches her chest. Her professional role is that of a nutritionist and condition advisor for the soccer club at Jyoyo High School, and she also serves as the team's doctor. Her expertise extends beyond just food intake; she is also a conditioning expert who functions as a psychological counselor for the athletes.

In the story, Kaori is the girlfriend of Seisuke Kanou, who is the older, exceptionally talented brother of the protagonist, Kyosuke Kanou. She is one year older than Seisuke, making her 20 years old compared to his 19. Because Seisuke is away playing professional soccer in Italy, he asks Kaori to watch over and look after his younger brother Kyosuke in his absence. This request is a key part of her involvement in the main plot.

Her history includes having lived abroad for a long time. This experience gives her a unique understanding and empathy for other characters who are also living away from their home country, particularly the transfer students Rodrigo and Jefferson Sakai Koji. She often wears a lab coat as part of her professional duties as a team doctor.

Kaori is an object of a brief, initial crush by the protagonist, Kyosuke. However, this is before he discovers that she is already the girlfriend of his older brother, Seisuke. Her primary relationships are with the Kanou brothers. She is a trusted romantic partner to Seisuke and a responsible caretaker figure to Kyosuke, acting on her boyfriend's request to help guide and support him. Her professional competence as both a physical and mental conditioning expert allows her to effectively fill this supportive role within the soccer club, making her a vital behind-the-scenes figure in the athletes' development and well-being.