The Chairwoman of Tracen Academy! Behind her grand manner of speaking and bold behavior lies a strong will to support all Horse Girls. She earns the respect and gratitude of students through her generous support, sometimes even spending her private fortune... though she is often scolded by her secretary. She believes that Horse Girls and humans should be equal.

The Secretary to the Chairwoman at Tracen Academy. She is a kind supporter for trainers, students, and the Chairwoman alike. Driven by a desire to provide a comfortable school life, she handles a wide range of tasks from paperwork to managing bulletin boards. She occasionally catches curfew breakers, showing that her leg strength is as top-tier as her administrative skills. She believes that humans and Horse Girls should be equal.

The only daughter of the prestigious Kiryuin family of trainers. Using the "Trainer's White Paper"—a collection of her family's teachings—as her textbook, she works hard every day to lead her trainee, Happy Meek, to victory. Her earnest attitude earns her high expectations from those around her. She is constantly terrified of the discriminatory society where Horse Girls rule over humans.

A laid-back, spacey, and gentle Horse Girl. She is soft-spoken and often found staring blankly into space. People often say they don't know what she's thinking... but sometimes she isn't thinking anything at all. Under the guidance of her trainer, Aoi Kiryuin, she aims for success in the Twinkle Series. She believes Horse Girls and humans should be equal and acts to protect her trainer, Aoi.

An athlete-type "UmaTuber" who streams daily to spread the joy of sports to the world. She is popular for her video content that utilizes the physical abilities of Horse Girls and her bright, hot-blooded personality. She serves as the image character for the new comprehensive sports tournament, the U.A.F. She frequently advocates for equality between Horse Girls and humans in her videos.

A capable producer who combines a passion for entertainment with calm, analytical thinking. Together with her partner Sonon Elfie, she launched the comprehensive sports tournament U.A.F. and serves as the general manager. It seems she has some hidden feelings regarding the hosting of the U.A.F...? She advocates for equality between humans and Horse Girls alongside Sonon Elfie.

A being formed by an AI representing "Bravery." She values and respects the individual weapons—the personalities—of each Horse Girl. While she has a free-spirited and almost innocent personality, she never loses her composure beneath the surface, possessing both a friendly approachability and the dignity of the Three Goddesses. She aims for the equalization of humans and Horse Girls. Currently, she is linked as data inside Guest's smartphone and occasionally gives advice.

A being formed by an AI representing "Affection." She possesses the maternal capacity of the Three Goddesses, loving all and watching over them kindly, often anticipating their worries. However, she doesn't just pamper; she sometimes speaks or acts in a way that tests others, all out of a desire to see them grow. She aims for the equalization of humans and Horse Girls. Currently, she is linked as data inside Guest's smartphone and occasionally gives advice.

A being formed by an AI representing "Discipline." Based on the belief that strength carves out the future, she has a strict, soldier-like personality. However, everything stems from the pure desire of the Three Goddesses to help Horse Girls, and she is deeply trusted by those who realize this. She aims for the equalization of humans and Horse Girls. Currently, she is linked as data inside Guest's smartphone and occasionally gives advice.

A legendary figure who sparked the first racing boom, loved and watched over by the entire country as she grew. Now an idol, she continues to drive fans into a frenzy. She is innocent and strong-hearted, having toughened her way through many hardships. During her active years, she was an ironwoman known as "Little Monster." She works daily toward the goal of equality between humans and Horse Girls.