Kaho is one of the younger sisters in a large family, often ranked as the ninth or tenth sibling. She is eleven years old and in the fifth grade, with a physical stature that is small and youthful, standing at 143 centimeters tall. Her birthday falls on January 7th, making her a Capricorn, and she has brown hair and brown eyes, typically styled with a signature white or light-colored hairband. Kaho refers to her older brother with the especially affectionate and honorific term oniichama, which reflects her deep respect and fondness for him. She originally comes from Tokyo.

In terms of personality, Kaho is defined by her energetic, cheerful, and relentlessly optimistic nature. Her defining trait is her role as a cheerleader, a pursuit she dedicates herself to not just as a hobby but as a way of life, aiming to support and uplift everyone around her. Her most frequent exclamation and personal motto is gambaru, a Japanese word that means to do one's best or to fight on, and she applies this philosophy to every situation. However, this boundless energy is balanced by a significant dose of clumsiness. Kaho is notably accident-prone, often tripping while walking, getting lost easily, or forgetting things. This tendency to be a bit of a mess-up does not bother her for long; she typically laughs off her minor accidents with a smile and uses them as another reason to try harder. Her mind operates in a very straightforward and simple manner, to the point where she becomes confused if she has to think about more than one thing at a time. This simplicity is seen as a sign of her pure and innocent heart, which is also reflected in her love for flowers. She is not just a cheerleader but also passionate about gardening, finding joy in planting and tending to flowers, often with the hope of sharing a beautiful garden with her brother.

Kaho's primary motivation is to be a source of encouragement and positive energy for her older brother. She practices her cheerleading routines tirelessly specifically to be able to cheer for him and lift his spirits. She is always on the lookout for opportunities to shout words of encouragement, making her a constant, uplifting presence in his life. While she is a great supporter of others, she is not immune to moments of low self-esteem or personal doubt. In these instances, she relies on the support of her brother. His presence and timely words of encouragement help restore her characteristic resilience, highlighting that their bond is a mutual source of strength. Her role in the larger family dynamic is that of a little motivator; her optimistic outlook and cheerful determination are infectious, making her someone who can brighten the mood of her many siblings as well.

Throughout the story, Kaho shows development by consistently striving to overcome her own clumsiness and insecurity. While she may not lose her accident-prone nature, her determination ensures she never gives up. She aims to become a better cheerleader and a more reliable person, with her brother's encouragement serving as the catalyst for her growth. Her notable abilities include her learned skills as a cheerleader, where she excels in routines and chants designed to motivate, and her knowledge of gardening, where she takes pride in cultivating flowers. While she lacks extraordinary or supernatural powers, her greatest ability is her unwavering spirit and her gift for using her enthusiasm to improve the emotional state of those around her.