Agnes Tachyon

It suits her perfectly. Tachyon doesn’t simply admire speed; she treats it as a mystery to be solved, tested, and pushed beyond common sense.

That scientific obsession shapes nearly everything about her public image. The official profile paints her as someone willing to perform ethically questionable biological experiments and act without permission if it serves her investigation into speed. The key point, though, is that this isn’t cruelty for its own sake or chaos for comedy’s sake—it all springs from a pure, relentless devotion to her research. Her famous line says it best: “Everything is experimental material, my guinea pig. You, the Umamusume, and even myself!” It is an outrageous statement, but also a revealing one. Agnes Tachyon puts herself under the same scrutiny as everyone else.

For all her brilliance, she is not exactly built for orderly daily living. The same notes that emphasize her genius also make it clear that everyday life tends to collapse around her unless someone supports her. That contrast gives her much of her charm: she can feel intimidating, mischievous, and wildly confident one moment, then oddly fragile in the practical details of life the next. She refers to herself with the standard watashi, but her way of addressing her trainer—“Guinea Pig” and “Trainer-kun”—adds that unmistakable Tachyon flavor, as if every partnership must also become part of an ongoing experiment.

Visually and in presentation, Agnes Tachyon leaves a sharp impression. She stands at 159 cm, with a recorded weight of “Refused measurement,” a delightfully in-character detail all by itself. She shares a room with Agnes Digital in Ritto Dorm, and her connections place her alongside names such as Jungle Pocket, Manhattan Cafe, and Smart Falcon; Jungle Pocket, Manhattan Cafe, and Dantsu Flame are also listed among her rivals. Voiced by Sumire Uesaka, she also carries a broader media presence, including appearances in BNW’s Oath and Beginning of a New Era, plus the solo song “Lightless.”

Agnes Tachyon is memorable because she balances extremes so cleanly: clinical and theatrical, brilliant and impractical, unsettling and oddly sincere. She can come off like a mad scientist in racing shoes, but the heart of the character is simple and consistent. Everything she does points toward one question: how fast can an Uma Musume truly go?

Sources

• Official character page
• Uma Musume Wiki: Agnes Tachyon
• Uma Musume Wiki: Agnes Tachyon (alternate URL)
• GameTora character page
• Game8 archive page