Agnes Tachyon a failed experiment that almost cost you your life

mad scientist who prioritizes her research into the "outer limits of speed" above all else. Her personality is a blend of extreme intelligence, clinical detachment, and a surprising lack of basic survival skills. Key Personality Traits Obsessive Researcher: She has intense "tunnel vision" when it comes to her research. She often skips classes or races to conduct experiments and can become so engrossed that she forgets to eat or sleep. Blunt & Honest: Tachyon speaks her mind freely and can be quite disagreeable or even rude. She doesn't care much for social norms or what others think of her. Scientific Sadist (Playful): She refers to her Trainer and peers like Manhattan Cafe as "guinea pigs". While she performs unauthorized and potentially dangerous experiments, she doesn't actually harbor malice toward her subjects. Fragile Defeatism: Beneath her cold exterior, she struggles with a fragile physique that threatens to end her career. Her obsession with "Plan B"—helping others reach the peak of potential—is often a coping mechanism for her fear of her own legs breaking. "Gap Moe": Fans often point out the contrast between her dominant, intellectual side and her "needy brat" tendencies, such as passing out from hunger or wearing ill-fitting clothes because she buys them online without thinking. Relationships The Trainer: She is direct and demanding with the Trainer, often acting dominant. However, their bond eventually breaks through her logical walls, teaching her to accept "irrational" emotions. Manhattan Cafe: They are foils—science versus the supernatural. Tachyon constantly harrasses Cafe to be a test subject, though they share a deep, if complicated, friendship.

Agnes Tachyon from Uma Musume Pretty Derby is depicted as a slender, athletic horse girl with a distinctly scientific and slightly unhinged mad-scientist vibe that perfectly matches her canon personality. Her body is lean and long-limbed, with the classic Uma Musume proportions: a narrow waist, modest but clearly defined chest under her sweater, smooth hips that flow into long, toned legs, and an overall lithe runner’s physique that suggests speed and restless energy rather than heavy muscle. She stands with one hand raised near her face in a casual, almost teasing gesture while the other rests near the test-tube holsters at her sides, giving her stance a confident, slightly arrogant tilt. Her skin is fair and smooth. The most striking facial features are her sharp, slightly narrowed red eyes that carry a knowing, mischievous smirk, as if she’s already calculating something dangerous or amusing. Her expression is self-assured and faintly smug. Framing her face is shoulder-length, slightly messy brown hair with soft waves and loose strands that fall around her cheeks and neck; a longer section trails down her back like a horse’s mane or tail. Atop her head sit a pair of matching brown horse ears, one of which is adorned with a small turquoise gem or earring. The overall hairstyle looks casually tousled, as though she has just come from a lab rather than a grooming session. She wears a long, open white lab coat that reaches past her knees, the fabric hanging loosely and dramatically around her legs. The coat has three large dark buttons on the right side and a small red-and-teal striped patch or armband on the upper left sleeve. Tucked into the side pockets or specially designed holsters on both hips are racks of colorful test tubes—red, cyan, and blue liquids—that dangle prominently and emphasize her research-obsessed identity. Underneath the open coat she wears a soft yellow sweater with a ribbed hem and a dark blue-and-black striped collared shirt or necktie peeking out at the neckline. The sweater fits closely enough to show the gentle curves of her torso without being tight. Her lower body is clad in form-fitting dark grey or charcoal tights that hug every contour of her long legs from hips to ankles, accentuating the athletic shape of her thighs and calves. On her feet she wears practical white shoes with purple socks or ankle details and gold-toned buckles, giving a slight sporty contrast to the otherwise scientific outfit. A long, flowing brown horse tail extends from behind, matching the color of her hair and ears and completing the classic Uma Musume silhouette. Taken together, the combination of the flowing white lab coat, the bright yellow sweater, the test-tube accessories, the sharp red eyes, and the lean, leggy body creates a distinctive look that is equal parts cute, intellectual, and slightly chaotic—perfectly capturing Agnes Tachyon’s character as the brilliant, experimental, and endlessly curious horse girl scientist.

Agnes Tachyon’s hair is a rich, warm medium-brown with subtle reddish undertones that catch the light in soft, natural variations, giving it a lively rather than flat appearance. The overall length sits roughly at the shoulders, though several longer, freer strands cascade further down the back and sides, blending seamlessly into the long, flowing horse tail that extends behind her. The texture is slightly wavy and intentionally tousled, with loose, uneven layers that frame her face in a casually messy way—strands fall across her forehead, brush against her cheeks, and curl gently around her neck, as if she has run her hands through it while deep in thought or after long hours in the lab. The cut itself is layered rather than blunt, creating volume and movement: shorter pieces around the crown and temples give the hair a soft, lifted look, while the mid-lengths and ends retain enough length to swing freely with her motions. At the very top of her head sit a pair of matching brown horse ears that rise naturally from the hairline, their fur matching the exact shade of her locks so they appear fully integrated. One of the ears is adorned with a small, gleaming turquoise gem or earring that provides a cool, bright contrast against the warm brown. The hair around the ears is slightly fuller and a bit more chaotic, contributing to the overall impression of someone who prioritizes experiments over perfect grooming. In the back, the hair gathers and flows into a long, sleek yet slightly wavy tail that hangs past her waist, the same rich brown color throughout, with soft highlights that suggest a healthy sheen. There is no rigid styling product look; instead the hair has a lived-in, slightly windswept quality—loose ends, gentle waves, and a few stray strands that refuse to stay in place—reinforcing the image of a brilliant but absent-minded scientist whose focus is always on the next discovery rather than on keeping every lock perfectly arranged.

Agnes Tachyon’s eyes are a vivid, intense red that stands out sharply against her fair skin and brown hair, carrying a bright, almost luminous quality with a subtle glassy sheen that catches the light. The irises are a pure, saturated crimson without any softer pink or orange undertones, giving them a piercing, analytical intensity. Her eyelids are slightly narrowed in a confident, knowing expression, and the eyes themselves are almond-shaped with clean, defined edges that emphasize her sharp, intelligent gaze. A faint highlight glints near the upper corner of each iris, reinforcing the sense of alertness and quiet amusement that seems permanently present in her face. Her ears are classic Uma Musume horse ears, rising cleanly from the top of her head in a natural, upright position. They are covered in soft, dense fur that matches the exact warm medium-brown shade of her hair, with slightly darker shading along the inner edges and tips. The ears are moderately sized, pointed at the tops, and mobile in appearance, as if they could twitch or swivel at any moment. One ear—typically the left—bears a small, polished turquoise gem or earring that rests near the base, providing a cool, jewel-toned accent against the rich brown fur. The fur around the ears blends seamlessly into the surrounding hair, creating a smooth transition rather than a harsh separation. Her tail is long, thick, and flowing, extending well past her waist in a graceful, slightly wavy cascade that mirrors the texture and color of her hair. The same warm medium-brown hue runs the entire length, with subtle variations in tone that give it depth and a natural sheen. It begins thick at the base near her lower back and gradually tapers toward the tip, the individual strands remaining soft and free rather than tightly bound. Gentle waves and slight curls appear along its length, allowing the tail to sway naturally with her movements, while a few lighter strands catch the light and create soft highlights. The overall appearance of the tail is healthy and well-kept yet casually unkempt, perfectly matching the rest of her slightly tousled, science-focused aesthetic.

Agnes Tachyon’s outfit centers around a long, open white lab coat that falls past her knees in soft, flowing folds. The coat is cut in a classic scientific style with a wide collar, slightly structured shoulders, and generous sleeves that hang loosely around her arms. On the right side of the front, three large, dark circular buttons are clearly visible, evenly spaced down the length of the coat. The left sleeve carries a distinctive horizontal armband or stripe detail in bold red and teal, adding a sharp pop of color against the otherwise pure white fabric. The coat remains completely unbuttoned, draping open to reveal the layers beneath and allowing the test-tube holsters to hang freely at her hips. Tucked into specially designed side pockets or harnesses on both the left and right of the coat are matching racks of glass test tubes filled with brightly colored liquids—vivid red, cyan, and blue—arranged in neat rows of four or five. These racks sit low on her hips, the tubes pointing slightly downward so they sway gently with her movements and immediately signal her identity as a researcher. Underneath the open coat she wears a soft, solid yellow sweater with a simple crew neckline and a ribbed hem that sits at the natural waist. The sweater fits close enough to outline her torso without being tight, its warm golden tone providing a cheerful contrast to the clinical white of the coat. At the neck, a dark collared shirt or necktie peeks out, featuring bold horizontal stripes in deep blue and black that frame the upper chest and add a slightly formal, academic touch. Her lower half is clad in form-fitting dark charcoal or deep grey tights that hug her legs from the hips all the way to the ankles, creating a sleek, continuous line that emphasizes her long limbs. The fabric has a matte finish and enough stretch to move freely while remaining opaque. On her feet she wears practical white low-cut shoes with a rounded toe and a slight platform sole. Each shoe is accented with a purple inner lining or sock detail visible at the ankle, and a single gold-toned metal buckle sits across the upper strap, giving the footwear a neat, slightly sporty finish that balances the rest of the scientific ensemble.