Kyōichi Ryūgamori hails from Nagano Prefecture as the heir to his family's 300-year-old inn. His childhood included rigorous training in traditional Japanese arts such as flower arrangement, the tea ceremony, and calligraphy. Junior high school introduced him to gymnastics, fostering notable flexibility that later proved advantageous in rhythmic gymnastics. Despite this early start, he did not secure a regular spot on his high school team during his first year.

He possesses long, pitch-black hair with bangs nearly obscuring his very dark blue eyes. His typical outfit is a purple and white tracksuit zipped fully to the collar. During practice, he wears a sports shirt featuring a red diagonal line between the collar and sleeve on each side, paired with leggings ending just below the knees.

His demeanor is consistently collected and relaxed, resulting in a soft-spoken manner. He expresses enthusiasm calmly, becoming notably talkative when discussing rhythmic gymnastics or flower arrangement. This contrasts with his otherwise aloof presentation, though he does not distance himself socially.

At Hakumei University Affiliated High School, he competes on the men's rhythmic gymnastics team, where his flexibility remains a technical asset. Outside gymnastics, he maintains an interest in horticulture, frequently adjusting floral arrangements to enhance their appearance and longevity. This hobby fostered a friendship with Keisuke Tsukidate from Sōshūkan High School, based on their mutual appreciation for plants.

The etymology of his name reflects his character: "Kyoichi" combines "modest" (恭) and "one" (一), while "Ryugamori" interprets as "dragon forest field" (竜ヶ森), incorporating "dragon" (竜), "field of..." (ヶ), and "forest" (森).