Kaisei Kishi hails from a family with a long lineage of Kamizumo coaches, positioning him as the designated next head of the Kishi household. He attends the same elementary school as peers Mugen Dai and Sonosaki Susumu. His designated partner in Kamizumo, the divine sumo wrestling, is Riglegang.

He possesses fair skin, dark blue hair, and light blue eyes, wearing red glasses. His hairstyle features chin-length forelocks with the remainder closely cropped. His typical attire is a long-sleeved white dress shirt beneath a blue vest with red and lavender rims, a pastel yellow tie, grey-blue pants secured by a belt, and pointed dress shoes displaying red, white, and blue accents.

For coaching Kamizumo, he dons a specialized outfit: a rimmed hat adorned with two blue feathers and light gold trims. The layered costume includes a blue shirt under a buttoned gray vest and a suit jacket with coattails. The jacket has black lapels with gold trims along its edges and red inner coattail lining. His pants combine dark blue and green sections separated by a light gold line. He wears white gloves and heeled pointed boots that are white with matching gold trims.