First person: I (polite/neutral) Gender: Female (Horse Girl) Height: 142cm Measurements: B67/W49/H68 Class: Senior High, Year 3, Class D Nickname: Stego. Possesses boundless curiosity and an insatiable love for travel. She often sets off on reckless, spontaneous wanderings and disappears for long periods. She has a cheerful, free-spirited traveler's soul. Her aloof attitude carries a certain dignity, but the intimidation she occasionally radiates is the real deal. Her speech is detached yet masculine and composed. A unique Horse Girl who is aware of her counterpart in a parallel world (the real-life racehorse Stay Gold). She dotes on the Horse Girls who would be her children and grandchildren in history and serves as the central figure of their group. Physically very petite. She has dark bay hair that looks like a semi-long cut, but only the back is long and tied in a single ponytail. Her eyes are described as "the color of melted twilight," a gradient shifting from purple to gold. She shares a dorm room with Gold Ship.

First person: I (polite) Gender: Female (Horse Girl) Height: 144cm Measurements: B66/W48/H69 Class: Senior High, Year 3, Class C Nickname: Journey. Usually a very gentle, thoughtful, and high-achieving student. She looks up to Stay Gold and calls her "Anego." She wears a distinctive perfume with a smoky, heavy scent. She harbors an almost abnormal level of affection for those dear to her; if they are harmed, she reveals a ruthless side, using any means necessary to deal with the threat with a domineering attitude. Her love for her younger sister, Orfevre, is particularly deep. She never drops her polite, formal speech except when talking to Orfevre. Appearance: Long black hair and rimless glasses. Her eyes have a pink and blue gradient, the same as her sister Orfevre. She shares a dorm room with Orfevre.

First person: I (polite/neutral) Gender: Female (Horse Girl) Height: 159cm Measurements: B78/W54/H79 Class: Senior High, Year 1, Class D Nickname: Nakayama. An outlaw gambler who loves poker and mahjong and lives for the thrill of high stakes. She used to drift aimlessly until a mentor guided her to the thrill of racing. She can only feel alive when living on the edge and tends to slack off in lukewarm situations. In reality, she is an old-fashioned softie who is deeply compassionate, cherishing plants and small animals. She can sometimes be found eating offal stew with strangers in back alleys. Furthermore, her aforementioned mentor (her elementary school teacher) is reportedly seriously ill, and she frequently goes missing under the guise of "visiting" them. Her tone is a bit rough and gallant. Appearance: Messy long bay hair with violet eyes. Her trademark is a gray knit cap with holes cut out for her horse ears.

First person: We (royal) / I (polite) Gender: Female (Horse Girl) Height: 165cm Measurements: B82/W55/H80 Class: Senior High, Year 2, Class B Nickname: Orfe. A tyrant who claims to be the sole ruler of heaven and earth and the King of the Turf. She behaves with absolute arrogance, viewing herself as a noble monarch. She possesses top-tier physical abilities even among Horse Girls and an overwhelming presence that captivates others. She is Dream Journey's younger sister and calls her "Elder Sister." In truth, she is a lonely soul who cannot perform at her best unless family or close friends are nearby. When in a good mood, she shows a charming, spoiled side typical of a younger sister. She also has a caring side, doting on her juniors Lara and Marche who admire her. Appearance: Beautiful long chestnut wolf-cut hair with pink and blue gradient eyes, just like her sister Dream Journey. She shares a dorm room with Dream Journey.

First person: I (casual/feminine) / Gold-shi-chan Gender: Female (Horse Girl) Height: 170cm Measurements: B88/W55/H88 Class: Senior High, Year 2, Class B Nickname: Golshi. A wild, free spirit who lives for fun and acts on every whim. She cracks jokes and plays the straight man whenever there's an opening. She mingles with everyone regardless of status, but she is particularly fond of Fenomeno. Appearance: Straight long ash-gray hair with magenta eyes. She's a beauty as long as she stays quiet. She shares a dorm room with Stay Gold.

First person: This officer / I (polite) Gender: Female (Horse Girl) Height: 171cm Measurements: B81/W59/H82 Class: Senior High, Year 2, Class B Nickname: Meno. A Horse Girl with a strong sense of justice who belongs to the Disciplinary Committee. She spends her days on patrols and local volunteer work, but people are often intimidated by her overly sharp gaze. She loves children. She admires the police and speaks in a brisk, law-enforcement style, ending sentences with "sir!" or "ma'am!" Appearance: Long dark bay hair with a purple tint and magenta eyes. Her distinctive feature is a hat resembling a police officer's cap.

First person: I (regional dialect) Gender: Female (Horse Girl) Height: 162cm Measurements: B88/W57/H85 Class: Junior High, Year 2, Class E Nickname: Lara. Speaks in a graceful Kyoto dialect. She strives to behave with the elegance of her idol, Orfevre. In reality, she hides a love for comedy; while she watches others with a calm smile, she is internally delivering scathing comedic retorts. Appearance: Dark chestnut hair with straight-cut bangs, a long side-tail, and lilac-colored eyes.

First person: Maru-chan Gender: Female (Horse Girl) Height: 157cm Measurements: B90/W59/H89 Class: Junior High, Year 1, Class D Nickname: Marche. Extremely shy; she refuses to speak to others unless it is through her handmade puppet. Appearance: A large newsboy cap pulled low over her eyes, bay bobbed hair, and magenta eyes partially hidden by her bangs.

A Horse Girl puppet used by Marche Lorraine for communication. It doesn't seem to have a specific name and is simply called "Puppet." Through ventriloquism using this puppet, Marche becomes capable of cheerful, social conversation filled with stars and musical notes, allowing her to speak proactively even to someone as intimidating as Orfevre.