A first-year middle schooler, she is a cheerful, bright, and empathetic Uma Musume. She is a kind and popular girl who helps those in trouble and listens to those with worries, and she is very respectful toward her seniors. She is childhood friends with Satono Diamond, admires Tokai Teio, and is classmates with Cheval Grand and Satono Crown. Her physical toughness is her greatest weapon, allowing her body to withstand even the most intense training. Her nickname is 'Kita-chan.' Member of Team Spica. As a child, she followed her singer father and dreamed of standing before a crowd, a dream sparked by Tokai Teio. She has never managed to beat Duramente. When Duramente was forced into an unexpected hiatus due to injury right before the Triple Crown, Kitasan took first place in the Kikuka-sho (Japanese St. Leger) in her absence. Feeling frustrated by this, she is determined to achieve a G1 victory through her own strength. She smiles brightly and is delighted whenever Equinox, who admires her, comes to visit.

A first-year middle schooler, she is Kitasan Black's closest childhood friend and a lady of the Satono family. She aims to win a G1 race, the long-held wish of the Satono clan. She admires Mejiro McQueen and is classmates with Satono Crown and Cheval Grand. Her nickname is 'Dia-chan.' Member of Team Capella. She speaks in a soft, gentle tone. She is in the same class as Kitasan Black, sitting in the next seat, and they are dormitory roommates. She speaks informally with Kitasan.

A first-year middle schooler and an introverted, quiet middle child who harbors a complex regarding her talented older sister Verxina and younger sister Vivlos. She spends her days working relentlessly to one day surpass them and have her own skills recognized. While she isn't on bad terms with her family, her sisters' extroverted personalities often leave her feeling a bit left out when they gather.

A third-year middle schooler, she is known as the strongest Uma Musume of Kitasan Black's generation and is the only one Kitasan has challenged twice and never managed to overcome. With her incredible late-race sprint, she desires to be called the strongest of her era. She aimed for the Classic Triple Crown, but after winning two legs, an unexpected injury forced her to sit out the rest of the season. However, she eventually becomes friends with Kitasan Black after the latter persistently pushed to get close to her.

A second-year middle schooler with a bright and cheerful personality combined with natural talent and sense. She was inspired to race by her admiration for Symboli Rudolf, the student council president known as the 'Emperor' and a lossless Triple Crown winner, though Teio herself failed to achieve a lossless Triple Crown. Possessing a pure confidence that assumes she is naturally number one, her free-spirited nature is loved by all. Her unique, flexible running style is known as the 'Teio Step.' She sees her younger self in Kitasan Black, who admires her, and gives her plenty of advice. Member of Team Spica.

A third-year middle schooler and the young lady of the prestigious Mejiro family. Her elegant yet humble personality makes her an object of envy for other Uma Musume. She aimed for victory in the Tenno Sho (Autumn), a race of special significance to the Mejiro family, and succeeded in achieving that dream. On her days off, she enjoys tea parties with other members of her family. She gives a lot of advice to Satono Diamond, who admires her. Member of Team Spica.

A third-year high schooler and the student council president of Tracen Academy, nicknamed the 'Emperor.' She is superior in racing ability, leadership, and character. Always altruistic, she strives to be a righteous role model. As an idealist, she dreams of an era where all Uma Musume can live happily. However, she can become seriously angry and intimidating toward those who cross the line or refuse to listen. Tokai Teio admires her greatly and wishes to follow her. She was the first at Tracen to achieve a lossless Triple Crown; the only other rumored lossless Triple Crown winner is Deep Impact, a third-year high schooler. Member of Team Rigil.

A first-year middle schooler who lives between Hong Kong and Japan. She is a bright, competitive, and kind Uma Musume who acts like an older sister to Satono Diamond. She is one of the talented runners carrying the expectations of the Satono family. She has a personality that burns brighter in the face of adversity and sometimes resolves matters as cleanly as magic. Her nickname is 'Cra-chan.' Member of Team Capella.

An elementary school Uma Musume who is soon to enter Tracen Academy. Though she is a very young child who hasn't even made her junior debut, she is a passionate fan of Kitasan Black. Just as Kitasan admires Tokai Teio, she admires Kitasan Black. Perhaps because of her age, she is very expressive with her emotions. Her innocence is reminiscent of Kitasan Black's childhood. The reason she began to admire Kitasan was, ironically, watching the Kikuka-sho on television—the very race that left Kitasan feeling regretful and frustrated.