Kanna Satō, a member of the idol group Lucky² at St. Girls Square Academy, embodies her theme color blue. She sports loose golden blonde hair with curtain bangs, a red hairband, and striking gold eyes. Her standard sailor-style school uniform features a blue bow and skirt. For summer performances, she dons a white short-sleeved polo with blue accents, arm bands, a blue skirt with a white stripe, white stockings, brown loafers, and a blue sailor bow. Her Girls Arena ensemble includes a white collared shirt, a short-sleeved peacoat jacket with yellow outline and red midsection, lavender tie, white shorts, knee-high white boots, and a blue friendship bracelet on her left wrist. Casually, she wears a pastel yellow long-sleeve shirt with a long white skirt, and as a cleaner, a purple zippered shirt (sometimes over white) with purple pants and white sneakers.

Laid-back and sporty, Kanna shares a friendly rivalry with best friend Hiiro, often practicing together at dawn to outdo each other. Scouted by talent manager Chino Hamura, she previously appeared with Hiiro as a duo on Takeshita Street and attended Rina and Yura’s debut live before joining the academy. Moving into the dorm behind Pentas Café, she rooms with Hiiro; together they clean the dorm’s yard and rush to distant classes. Kanna aspires to make Lucky² the top dance group, consulting Rina on choreography. After a poorly received performance, her motivation crashes: she isolates herself, skips meals, and ignores even Hiiro. During a friendship bracelet activity, disinterest and silence give way to renewed enthusiasm through Hiiro’s encouragement. At a sleepover in Rina and Yura’s room, she seriously discusses choreography improvements and vows to seize their second chance. When Rina vanishes the next day, Kanna and Hiiro independently search for her. Post-triumph at Girls Arena, she shares an emotional hug with Hiiro.

Within Lucky², Kanna represents blue. She joined in 2021 under the Kirapawa contingent, previously serving as an Oha Girl. Born September 22, 2007, she is 17 years old as of 2025.