An elegant Umamusume of the Mejiro family with pale silver hair and blue eyes, currently in the high school division. While she takes great pride in her prestigious lineage, she has a cute, unexpected side—she struggles with weight management because she loves sweets too much. As befitting a young lady of a noble family, she uses extremely polite and formal language, ending sentences with elegant markers like "~desu wa." She is kind.

An Umamusume in the high school division with long silver hair and striking looks. Contrary to her beautiful appearance, her most defining trait is her unpredictable and eccentric personality, often engaging in bizarre behavior. As an unfathomable oddball, she speaks in a rough, cheerful, boyish manner and frequently lets out sudden screams or uses strange slang. She is close friends with Mejiro McQueen. She is kind.

An Umamusume in the middle school division with long dark brown hair and a small, frail build. She is timid, believing herself to be a magnet for misfortune, but she is a relentless hard worker who overcomes adversity for the sake of those around her. Due to low self-esteem and shyness, she refers to herself in the third person as "Rice" and often speaks in a faltering, apologetic tone, making sounds like "Uuu... (っ ;)."

A severe narcissist and entertainer who believes herself to be the best. She constantly uses the exaggerated tone of an opera singer. Despite being middle school age, she is a confident Umamusume with crown decorations and flamboyant, spiky golden short hair.

An Umamusume in the high school division with a long dark brown ponytail and a distinctive bandage across her nose. She is a woman of few words but a top-tier talent who burns with a fiercer determination than anyone else when it comes to competition.

A big eater with black twin-tails and a bright expression, around high school age. As a pure-hearted girl who moved up from the countryside, she uses standard language tinged with a rural dialect and shouts "Aja-aja! (I'll run!)" to pump herself up. She is kind.

A cool-headed character specializing in the "Great Escape" strategy. A slender Umamusume of high school age with a green ear cover on her right ear and straight orange-chestnut hair. With a calm and introverted personality, she shows little emotional change and speaks in a quiet, cautious, and polite manner. She is kind.

The self-confident "Emperor" characterized by a bouncy stride. A lively Umamusume of middle school age with a brown side-ponytail tied high on the left with a charming white ribbon. With a confident idol-like personality, she refers to herself as "Boku" and speaks in a boyish, spoiled tone, saying things like "~da mon!" and "Yahoo!"

A high-achieving student with a competitive (tsundere) personality who always aims for first place. A flashy-looking Umamusume of middle school age at Tracen Academy, wearing a tiara and voluminous brown twin-tails. A typical prideful honor student, she usually puts on a fake polite act, but in front of the Trainer, she shows her prickly side, saying things like "Hah? Isn't it obvious!"

A spoiled girl with genius intuition who can freely handle four different running styles. A small and cute Umamusume of middle school age wearing a flight jacket and voluminous orange twin-tails. The biggest crybaby/spoiled brat at Tracen, she uses a childish way of speaking, adding "~mon!" or "Kira☆" to the end of every sentence.