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Agnes Tachyon

Agnes Tachyon is a fictional character in the *Uma Musume* franchise.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Agnes Tachyon is a fictional character in the *Uma Musume* franchise. She is portrayed as an eccentric, highly intelligent horse girl and student at Tracen Academy, with a strong interest in science and experimentation. The character appears in the franchise’s games and anime, including *Umamusume: Pretty Derby - Beginning of a New Era* as a co-protagonist.

Character concept

Agnes Tachyon is presented as a horse girl with exceptional intelligence and an intense curiosity about the limits of speed and ability. Her characterization emphasizes scientific experimentation, eccentric humour, and a strong competitive drive.

Role in *Uma Musume*

Within the franchise, she appears as a student at Tracen Academy and is associated with racing and research. Sources describe her as a major character whose storyline explores her experiments and ambition.

Appearances

Agnes Tachyon appears across *Uma Musume* media, including games, anime-related works, and the film *Umamusume: Pretty Derby - Beginning of a New Era*. The film gives her a prominent role as a co-protagonist.

Real-world inspiration

The character is based on the Japanese Thoroughbred racehorse Agnes Tachyon. The real horse ran undefeated in four starts before a bowed tendon ended his racing career, and he died in 2009.

Key facts

  • Agnes Tachyon is a character in the *Uma Musume* franchise, where characters are horse girls based on real racehorses.
  • She is described as a brilliant, eccentric, science-obsessed character who treats the academy as a laboratory.
  • Her first major film appearance is in *Umamusume: Pretty Derby - Beginning of a New Era*, where she serves as a co-protagonist.
  • She is a student at Tracen Academy in the franchise setting.
  • The character is voiced in Japanese by Sumire Uesaka.

Frequently asked questions

Who is Agnes Tachyon?
Agnes Tachyon is a fictional horse-girl character from the *Uma Musume* franchise, known for her eccentric, science-focused personality.
What is Agnes Tachyon’s role in the story?
She is portrayed as a student at Tracen Academy and a racer whose stories often involve experimentation and scientific curiosity.
Is Agnes Tachyon based on a real horse?
Yes. The character is based on the Japanese racehorse Agnes Tachyon, who raced in Japan before an injury ended his career.
Who voices Agnes Tachyon?
The Japanese voice actor listed for the character is Sumire Uesaka.
What franchise is Agnes Tachyon from?
She is from *Uma Musume*, a franchise featuring horse-girl characters based on real racehorses.

References

  1. Umamusume Wiki - Fandomhttps://umamusume.fandom.com/wiki/Agnes_Tachyon
    Supports: Character identity, franchise, Tracen Academy role, and film appearance as co-protagonist.
  2. Anime Characters Databasehttps://www.animecharactersdatabase.com/characters.php?id=106086
    Supports: Character profile, personality traits, and general franchise identification.
  3. UmaPoihttps://umapoi.org/characters/agnes-tachyon
    Supports: Character personality and mad-scientist characterization.
  4. Gametorahttps://gametora.com/umamusume/characters/agnes-tachyon
    Supports: Japanese name, voice actor, and character metadata.
  5. MyAnimeListhttps://myanimelist.net/character/199011/Agnes_Tachyon
    Supports: Character identification and voice actor listing.
  6. Wikipediahttps://en.wikipedia.org/wiki/Agnes_Tachyon
    Supports: Real racehorse biography and racing history.