Suomi Kitano is a 17-year-old figure skater of Finnish and Japanese descent, distinguished by her blonde hair, blue eyes, and slim build. Born on October 1, she stands 157 cm tall. Her Finnish first name meaning "Finland" reflects her heritage.

She aimed for Finland's national team until a practice collision with her best friend and skating rival caused a career-threatening injury, fracturing their bond. Before this accident, they had shared a wish upon seeing diamond dust—a rare phenomenon where ice crystals glitter like diamonds—to win a gold medal together.

The injury extinguished Suomi's passion for skating, leading her away from the ice. Her perspective changes upon meeting Haruto, a young male skater struggling with conflict over ambitions involving his own friend. Guiding Haruto rekindles Suomi's love for skating and helps her confront the emotional burden of her past. She realizes skating should nurture friendships, not harm them.

Her story focuses on friendship and personal reconciliation, not romance. While diamond dust folklore often promises romantic happiness to couples witnessing it, Suomi's narrative centers on its significance in healing a platonic bond and reigniting joy in her craft. The experience with Haruto empowers her return to skating, resolving past tensions and fulfilling the essence of her original diamond dust wish.