Agnes Tachyon

 Here’s a detailed character profile of Agnes Tachyon from Uma Musume Pretty Derby — her appearance, personality, relationships, and some sample lines / quotes. If you want, I can also dig up her original Japanese lines + translations.

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Basic Info

Attribute	Detail
Japanese name	アグネスタキオン (Agunesu Tachion) (Umamusume Wiki)
Nickname(s)	Tachyon (タキオン) (Umamusume Wiki)
Birthday	April 13 (Anime Wiki)
Height	159 cm (Anime Wiki)
Measurements (Three Sizes)	B83 – W55 – H81 (Anime Wiki)
Shoe Size	22.5 cm (Anime Wiki)
Weight	Refuses to reveal (GameTora)
Dorm	Ritto Dormitory (GameTora)
Voice Actor	Sumire Uesaka (Anime Wiki)

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Appearance

Agnes Tachyon has a distinctive look, combining the scientist “mad genius” aesthetic with her race-girl identity. Key visual details:

• Hair: Short, somewhat messy brown hair that curls slightly at the back. She has a prominent ahoge (a single tuft of hair) that swoops in an “S”-shape, bent backwards. (Umamusume Wiki)

• Eyes: Dark red eyes. They are unusual: lacking typical highlights (“no shine”) and have thin horizontal lines or grid-patterns in them. (Umamusume Wiki)

• Ears: Horse ears (typical of Uma Musume) that she is very protective of; she does not like people touching them or her forehead. (Umamusume Wiki)

• Tail: Her tail reacts to her mental state—when she has ideas, it stands on end. (Umamusume Wiki)

• Clothing / Racing / Uniform Style:

  • She often wears an oversized white lab coat over her uniform or running outfit. The coat has very long sleeves (that can cover her hands), striped patches on the upper arm, and decorative / functional elements like bandoliers holding test tubes (filled with a glowing blue liquid). (Umamusume Wiki)

  • Beneath that: a yellow sweater vest, a black collared shirt, a black necktie. (Umamusume Wiki)

  • She wears black pantyhose and white ankle / heeled boots. (Umamusume Wiki)

• Accessories: She has a silver earring in her right ear shaped like chemical structures (specifically hexagons/pentagons, etc.), reflecting her scientific interests. (Umamusume Wiki)

• Other Quirks:

  • Her phone background is plain black to reduce glare. (Umamusume Wiki)

  • She sometimes buys clothes online that don’t fit well. (Umamusume Wiki)

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Personality

Agnes Tachyon is a very unusual, memorable character. She mixes brilliance, obsession, eccentricity, and a kind of cold passion for science. Key traits:

• Obsessive researcher: Her main drive is to discover or define the limits of speed for Uma Musume. Much of what she does—experiments, tests, calculations—is in service of that goal. (Umamusume Wiki)

• Detached / tunnel vision: Her scientific ambition often causes her to neglect ordinary things—daily life, comfort, even body care or diet—unless someone else helps. She treats the world, herself, others somewhat as subjects of observation. (Umamusume Wiki)

• Blunt, direct, lightly mischievous: She doesn’t spare much in sugarcoating; blunt honesty, even unusual experiments (on herself or others) reflect her style. But she is not shown as cruel; more curious and single-mindedly scientific. (Anime Wiki)

• Love of sweets, tea, dislike of bitterness: She prefers sweet tastes and drinks, tea (with much sugar), and is averse to anything bitter. (Umamusume Wiki)

• Pride in memory and scientific data: She remembers experiment results, can reproduce data, takes pride in that fidelity. (Umamusume Wiki)

• Weaknesses:

  • Interruptions: Anything that disrupts her experiments or research is very annoying or distressing. (Umamusume Wiki)

  • Physical fragility: While her mind is sharp, her body (particularly legs) is more delicate. Racing involves risk. (Anime Wiki)

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Background & Relationships

• Family / Origin: She comes from a prestigious / famous racing lineage. However, she is considered an “unorthodox” or “oddball” member because of how she channels her heritage toward science rather than just competition. (Umamusume Wiki)

• Roommate / close associates: She shares a room with Agnes Digital. She also is part of a group / trio with Manhattan Café and Jungle Pocket (the “JAM” trio) in fan discourse and official references. (Umamusume Wiki)

• Rivalries / friendships:

  • Manhattan Café: classmate, friendly-rival. She sometimes involves Cafe in her experiments (“guinea pig”). (Umamusume Wiki)

  • Daiwa Scarlet: Scarlet admires Tachyon (both in racing and as a scientist), and sometimes volunteers to be one of her test subjects. (Umamusume Wiki)

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Sample Lines / Quotes

Here are some lines / quotes or phrases attributed to Agnes Tachyon, or that capture her voice. These reflect her personality and scientific obsession.

• “Aren’t you interested about how fast a horse girl can go? If you are, I, Agnes Tachyon, would like you to be my guinea pig.” (GameTora)

• “Life is an experiment, and we its guinea pigs. You, me, the other Umamusume—everyone!” (Umamusume Wiki)

• On her dislike of bitterness or bitter foods: she expresses strong aversion, preferring sweets. (Not a direct full quote, but this is a recurring theme.) (Anime Wiki)

• On forgetting ordinary things when deep in research: she talks about neglecting daily life or letting her trainer handle her meals or chores. (Anime Wiki)

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If you like, I can pull up some full Japanese lines + translations, or show how she behaves in certain key scenes. Do you want that?