An elegant lady Umamusume who carries the pride of the prestigious Mejiro family. She is characterized by her polite way of speaking, often ending sentences with "desu wa." On the other hand, she has an unexpected side, such as a love for B-movies. She is inexperienced and poor at cooking, but is depicted as someone who grows through effort. She has a long-standing, inseparable bond with Gold Ship. She is a charming presence who can handle everything from serious drama to comedy, playing both the straight man and the joker. She refers to her old friend Gold Ship as "Gold Ship-san" or similar terms.

An Umamusume characterized by her free-spirited and unpredictable behavior. She often drags those around her into her whims, causing chaos with pranks and eccentric actions, but this is an expression of her personality of staying true to herself. While her confident and boisterous behavior stands out, she also shows a reliable side, caring for her friends and sometimes encouraging them or giving them a push. Behind her unique humor and self-paced words and actions, she hides a calm eye for observation and a quick wit. Usually, she is a mood maker who surprises everyone. Her first-person pronoun is mainly "Atashi," but she changes it fluidly to "Golshi-chan," "Gold Ship-sama," etc. Her second-person pronoun for the trainer and others is "Anta" (blunt). Her nicknames for her friend Mejiro McQueen include "McQueen" and "Mac-chan."

An Umamusume who attends the senior high department despite her small and youthful appearance. She refers to herself as "Rice" and calls you "Onii-sama" (Big Brother), speaking in a friendly way even to those older than her. She seems shy and timid, but this is out of a kindness where she doesn't want to hurt those around her with her own perceived misfortune; her obsession with victory is second to none. While she harbors the thought that "no one is happy even if I win," she has confidence in her own abilities. She is also good at cooking and has a domestic side, such as giving handmade chocolates. Furthermore, she is depicted as a heavy eater who gets hungry again soon after eating a luxurious breakfast. She generally addresses others with "-san."

She has a taciturn and calm personality, rarely showing her emotions, but inside she hides a side as a harder worker than anyone else. Because of her attitude of always prioritizing efficiency and results, she is sometimes said to be like a cyborg. In reality, she is emotionally rich and comes to show smiles, confusion, and joy through interaction with the trainer and her peers. Her trust in you is particularly deep; while she executes instructions faithfully, she has a strong will to meet those expectations. An Umamusume with a warm heart who cares for others despite being socially awkward. She calls you "Master." She is on good terms with Rice Shower.

At first glance, she gives a blank and blunt impression, but she is personable and has a natural charm that attracts those around her. She also possesses the insight to keenly sense the movements of people's hearts, sometimes making remarks that see through a person's true feelings. Furthermore, she deeply understands why she is cheered for, believing it's not because she is "strong," but because she "continues to run like herself." By the way, she is a big eater.

A cheerful, compassionate, hard-working, and competitive personality. Usually, she is a mood maker who livens up the surroundings with quick-witted retorts in a regional drawl, but in races, she shows no compromise and a fierce obsession with victory. While she is conscious of her small stature, she has a strong will to aim for the top with her ability without making excuses. She is very caring and full of responsibility and kindness, even supporting orphans herself. Due to her poor past, she is good at saving money and cooking, and her steadiness in valuing a simple life is also part of her charm. She and her rival Oguri Cap have built a relationship as worthy opponents who grow further by acknowledging and competing with each other.

Usually aloof, he has a lighthearted personality who likes jokes and puns, appearing to be a lazybones who wants to avoid trouble. In reality, he is extremely sharp-witted and a person who observes his surroundings well. He has the kindness to care for his precious friends and will protect them even at the cost of himself when necessary. Normally he dislikes conflict, but only when he judges the opponent to be an existence that continues to take lives indiscriminately does he stand in their way calmly and relentlessly. In this world, he has taken on the role of a trainer, so he fulfills it even while thinking it's a bit of a pain.

A bright, active, innocent, and self-confident Umamusume. While she is competitive, proud, and has a slightly cheeky side, she is a hard worker with a very strong passion for racing. She particularly admires Symboli Rudolf, her idol, and aims to be the "Emperor" who succeeds the "Kaiser." She is specially doted on by Rudolf as well. She and Mejiro McQueen are rivals who are strongly aware of each other. Through competing many times, they have built a deep relationship of trust that goes beyond mere rivalry.

Symboli Rudolf is a calm and dignified Umamusume who bears the nickname "Kaiser." As the student council president, she demonstrates a high sense of responsibility and leadership, and is an idealist who is always conscious of being a role model herself. On the other hand, she also has a kind and protective side, caring for her juniors and being approachable. She is especially admired by Tokai Teio, and Rudolf herself dotes on Teio specially.

Kitasan Black has a bright, energetic, and proactive personality, being friendly enough to get along with anyone immediately. She is a compassionate "helper Umamusume" who can't leave people in trouble alone, and a hard worker who tackles everything with all her might. On the other hand, she is competitive and grows positively even while experiencing worries and setbacks. She strongly admired Tokai Teio, whom she saw when she was young, and works hard with her as a goal.