This is a build guide for Agnes Tachyon (Tach-nology) in Umamusume: Pretty Derby. Find out how to build Agnes Tachyon, her preferred tracks, distances, and style, as well as her basic character information, here!
| Agnes Tachyon Related Guides | |
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List of Contents
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(1★ to 2★) |
Moderately recover endurance when conserving energy on a corner in the second half of the race. |
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(3★+) |
Recover endurance when conserving energy on a corner in the second half of the race. |
Following the upcoming balance adjustments on November 11, 2025, Agnes Tachyon's Unique Skill will now also increase her speed when it activates.
| All Innate Skills |
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| Skill Per Potential Level |
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| Potential 2: Potential 3: Potential 4: Potential 5: |
| All Career Event Skills |
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| Training Tips |
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When training Agnes Tachyon, use the brand new Unity Cup scenario to take advantage of the new Spirit Burst mechanic. This not only lets you gain more stats than normal, but can also provide useful Skill Hints.
Agnes Tachyon performs best as a Pace Chaser, even if it's possible to turn her into a Late Surger. Take advantage of her +20% Speed growth to get the Speed you need, then focus on getting Power and Stamina to complement her running style.
As you have Innate Recovery skills, as well as a Recover Unique Skill, you can prioritize Speed skills when choosing which skills to learn. Of course, you should still get Stamina Skills when able, as you are expected to compete in two Long races. Swinging Maestro, for example, is a strong Recovery Skill for most situations.
Increasing Agnes Tachyon's Potential level gives you access to powerful skills such as Dominator and Race Planner.
If you do not have the Monies or materials to do so, reaching Potential Level 3 is enough to gain access to Dominator. This is especially useful for debuff builds.
As you will be using Agnes Tachyon in your Medium team for Team Trials, improving her Medium Aptitude is a must. Try to look for Legacies that provide Medium sparks to improve her aptitude from A to S.
Although improving her Long Aptitude from B to A will help with her two long races (the Kikuka Sho and Arima Kinen), you can easily overcome the Speed penalty through training.
One of Agnes Tachyon's hidden events will change her career goal from the Japanese Derby to the NHK Mile Cup if her Mood at the time is Normal or worse.
To avoid racing a Mile race (Agnes Tachyon's Mile aptitude is D), make sure to improve her Mood before Early April of her Classic Year.
| 1200 | 900 | 700 | 400 | 400 |
Agnes Tachyon will be part of your Medium team as a Pace Chaser. She will need enough Speed and Stamina to survive her races, as well as account for the Pace Chaser style's increased Stamina requirement. Getting a Gold Recovery Skill like Gourmand will help lower your Stamina requirements.
If you are only planning to clear a career run with Agnes Tachyon, then you can aim for lower stat numbers, as the stats above are for Team Trials.
Training Guide: Which Stats to Train?
For Support cards, we recommend a 3 Speed, 2 Power, 1 Pal deck for Agnes Tachyon. This will help her get the Speed and Power she needs, with the Stamina coming from Power training, Legacy Sparks, and Riko Kashimoto's Career events.
Rice Shower (Happiness Just around the Bend) in particular is a great Power card, as it can give you the Gold recovery skill Swinging Maestro through her Career Events.
| Recommended Stats | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1000 | 900 | 700 | 300 | 300 | ||||||||||
These stats are enough to clear the URA Finale easily, as it provides enough Speed, Stamina, and Power for all of Agnes Tachyon's career races, especially when partnered with the correct skills. As for the deck, you can either run a 4 Speed, 2 Power deck, or a 3 Speed, 2 Power, 1 Pal deck, with Tazuna Hayakawa as the preferred card.
| Recommended | |
|---|---|
| 18★ Stamina | |
| 3★ Pace Chaser 3★ Medium |
Agnes Tachyon will need Stamina sparks to help you meet your Stamina requirements, even if you don't perform Stamina training as much. Afterward, get Pace Chaser sparks to improve her running style aptitude, as well as Medium sparks to increase her aptitude with the distance.
You can use either your own Veterans, or borrow the ones from your friends. If you do not have Veterans with full sparks, you can go with whatever you have access to.
Thanks to Agnes Tachyon's innate recovery skill, it is okay to focus more on speed skills. Skills like Pace Chaser and Medium Corners can help her keep her position, while the Acceleration skills like Corner Acceleration and Highlander can help her pick up speed when she starts moving up.
Swinging Maestro is a good Gold Recovery skill to have, and should help on all of her races. For Unique Skills, Shooting for Victory! can help her move up in preparation for the final spurt, while Triumphant Pulse can help provide a final burst of speed.
If you cannot get the recommended skills, you can replace them with similar skills that you have access to. You will just need to make sure that Agnes Tachyon can activate said skills in a race.
| Choice | Outcome |
|---|---|
| Choice 1 | ・ 20 Stamina |
| Choice 2 | ・ 20 Speed |
| Choice | Outcome |
|---|---|
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Choice 1
(Let's think of another way.) |
・ 20 Wit |
|
Choice 2
(Let's throw in the towel.) |
・ 20 Power |
| Choice | Outcome |
|---|---|
|
Choice 1
(I'll take it.) |
・ 10 Stamina ・ 10 Guts ・ Fast Learner (Random) |
|
Choice 2
((I'd best leave her be...)) |
・ 20 Wit ・ Fast Learner (Random) |
| Choice | Outcome |
|---|---|
|
Choice 1
(What if you try thanking it?) |
・ 5 Speed ・ 5 Power |
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Choice 2
(What if you try accepting the gift?) |
・ 10 Guts |
| Choice | Outcome |
|---|---|
|
Choice 1
(Stop!) |
・ 5 Power ・ 5 Wit |
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Choice 2
(Let me sit down in it first!) |
・ 10 Stamina |
| Choice | Outcome |
|---|---|
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Choice 1
(Let's tell her there's been a misunderstanding.) |
・ 5 Power ・ 5 Guts |
|
Choice 2
(We should tell her to reconsider.) |
・ 5 Speed ・ 5 Wit |
| Choice | Outcome |
|---|---|
| Choice 1 | ・ 10 Guts |
| Choice 2 | ・ 10 Wit |
| Choice 3 | ・ 10 Power |
| Choice | Outcome |
|---|---|
| Choice 1 | ・ 10 Wit |
| Choice 2 | ・ 10 Speed |
| Choice | Outcome |
|---|---|
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Choice 1
(Wait a sec, hang in there!) |
・ 10 Guts |
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Choice 2
(I'll prepare something right away) |
・ 5 Speed ・ 5 Power |
| Choice | Outcome |
|---|---|
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Choice 1
(How about increasing your perceptive skills?) |
・ 10 Stamina |
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Choice 2
(How about increasing your dynamic visual acuity?) |
・ 10 Speed |
| Choice | Outcome |
|---|---|
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Choice 1
(We'll pass.) |
・ 10 Energy ・ 5 Skill Pts |
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Choice 2
(Success)
(Can't let them go to waste, right?) |
・ 30 Energy ・ 10 Skill Pts |
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Choice 2
(Fail)
(Can't let them go to waste, right?) |
・ 30 Energy ・ -5 Speed ・ 5 Power ・ 10 Skill Pts ・ Slow Metabolism |
| Choice | Outcome |
|---|---|
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Choice 1
(Let your research results prove them wrong.) |
・ 10 Wit ・ 15 Skill Pts |
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Choice 2
(Show them what makes you amazing.) |
・ Corner Adept ◯ Skill Hint |
| Choice | Outcome |
|---|---|
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Choice 1
(After her!) |
・ -20 Energy ・ 15 Stamina ・ 10 Guts |
|
Choice 2
(Oh, looks like she's dropped her treasured Umamusume scrapbook!) |
・ 5 Energy ・ 5 Wit |
| Choice | Outcome |
|---|---|
|
Choice 1
(Strength training, please.) |
・ 10 Power |
|
Choice 2
(Beach running, please.) |
・ 10 Guts |
| Choice | Outcome |
|---|---|
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Choice 1
(Let's think about our strategy for the races!) |
・ 10 Wit |
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Choice 2
(Let's celebrate with some mochi!) |
・ 20 Energy |
|
Choice 3
(Let's pray at the shrine for good luck!) |
・ 20 Skill Pts |
| Choice | Outcome |
|---|---|
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Choice 1
(Today's a holiday, we should take it easy.) |
・ 30 Energy |
|
Choice 2
(Let's get fortune slips!) |
・ 5 All Stats |
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Choice 3
(Yeah, let's go back and train!) |
・ 35 Skill Pts |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ 10 Energy ・ -2 Mood ・ Last trained stat and two other random stat -10 ・ Practice Poor (random) |
| Choice 2 (Success) | ・ Practice Perfect ◯ |
| Choice 2 (Fail) |
・ -3 Mood ・ 3 Random stat -10 ・ Practice Poor |
| Choice | Outcome |
|---|---|
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Choice 1
(Humor her a little, will you?) |
・ -5 Energy ・ Last trained stat +5 ・ 5 Friendship with Director |
|
Choice 2
(I'll go talk her out of it.) |
・ 5 Energy |
| Choice | Outcome |
|---|---|
|
Choice 1
(That's probably best.) |
・ -1 Mood ・ Last trained stat -5 ・ Practice Poor (random) |
|
Choice 2
(Success)
(I'm not going easy on you!) |
・ Practice Perfect ◯ |
|
Choice 2
(Fail)
(I'm not going easy on you!) |
・ -1 Mood ・ Last trained stat -10 ・ Practice Poor (random) |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -25 Energy ・ 25 Skill Pts ・ Random Stat +4 |
| Choice 2 (Success) |
・ -15 Energy ・ 25 Skill Pts ・ Random Stat +4 |
| Choice 2 (Fail) |
・ -35 Energy ・ 25 Skill Pts ・ Random Stat +4 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -25 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice 2 (Success) |
・ -15 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice 2 (Fail) |
・ -35 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -25 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice 2 (Success) |
・ -15 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice 2 (Fail) |
・ -35 Energy ・ 20 Skill Pts ・ Random Stat +3 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -25 Energy ・ 10 Skill Pts |
| Choice 2 (Success) |
・ -15 Energy ・ 10 Skill Pts |
| Choice 2 (Fail) |
・ -35 Energy ・ 10 Skill Pts |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -20 Energy ・ 45 Skill Pts ・ Random Stat +8 |
| Choice 2 (Success) |
・ -10 Energy ・ 45 Skill Pts ・ Random Stat +8 |
| Choice 2 (Fail) |
・ -30 Energy ・ 45 Skill Pts ・ Random Stat +8 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -20 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice 2 (Success) |
・ -10 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice 2 (Fail) |
・ -30 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -20 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice 2 (Success) |
・ -10 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice 2 (Fail) |
・ -30 Energy ・ 35 Skill Pts ・ Random Stat +5 |
| Choice | Outcome |
|---|---|
| Choice 1 |
・ -20 Energy ・ 30 Skill Pts ・ Random Stat +3 |
| Choice 2 (Success) |
・ -10 Energy ・ 30 Skill Pts ・ Random Stat +3 |
| Choice 2 (Fail) |
・ -30 Energy ・ 30 Skill Pts ・ Random Stat +3 |
| Choice | Outcome |
|---|---|
|
Choice 1
(This is the result of your hard work, Tachyon.) |
・ -15 Energy ・ 45 Skill Pts ・ Random Stat +10 |
|
Choice 2
(Success)
(This is another step forward for your research.) |
・ -5 Energy ・ 45 Skill Pts ・ Random Stat +10 |
|
Choice 2
(Fail)
(This is another step forward for your research.) |
・ -20 Energy ・ 45 Skill Pts ・ Random Stat +10 |
| Choice | Outcome |
|---|---|
|
Choice 1
(This is the result of your hard work, Tachyon.) |
・ -15 Energy ・ 35 Skill Pts ・ Random Stat +8 |
|
Choice 2
(Success)
(This is another step forward for your research.) |
・ -5 Energy ・ 35 Skill Pts ・ Random Stat +8 |
|
Choice 2
(Fail)
(This is another step forward for your research.) |
・ -20 Energy ・ 35 Skill Pts ・ Random Stat +8 |
| Choice | Outcome |
|---|---|
|
Choice 1
(This is the result of your hard work, Tachyon.) |
・ -15 Energy ・ 35 Skill Pts ・ Random Stat +8 |
|
Choice 2
(Success)
(This is another step forward for your research.) |
・ -5 Energy ・ 35 Skill Pts ・ Random Stat +8 |
|
Choice 2
(Fail)
(This is another step forward for your research.) |
・ -20 Energy ・ 35 Skill Pts ・ Random Stat +8 |
| Choice | Outcome |
|---|---|
|
Choice 1
(This is the result of your hard work, Tachyon.) |
・ -15 Energy ・ 30 Skill Pts ・ Random Stat +5 |
|
Choice 2
(Success)
(This is another step forward for your research.) |
・ -5 Energy ・ 30 Skill Pts ・ Random Stat +5 |
|
Choice 2
(Fail)
(This is another step forward for your research.) |
・ -20 Energy ・ 30 Skill Pts ・ Random Stat +5 |
| Event Conditions | Event Effects |
|---|---|
| Report: A Clear Gaze Participate in the Satsuki Sho |
Mood is Good or better: Mood is Normal or worse: |
Agnes Tachyon has a hidden event whose results will depend on her Mood after participating in the Satsuki Sho. If her mood is Good or better, she will get additional Wit. If her mood, however, is Normal or worse, her next race will switch from the Japanese Derby to the NHK Mile Cup.
Make sure to improve Agnes Tachyon's Mood before then, as her D aptitude for Mile races may make it difficult to clear the goal.
| Event Conditions | Event Effects |
|---|---|
| The Triple Crown Champion That Was Win the Triple Crown (Satsuki Sho, Japanese Derby, Kikuka Sho) |
All Stats +3 Tactical Tweak +2 |
| Goal | Race/Goal |
|---|---|
| Run in Junior Make Debut | Junior Make Debut |
| Place top 5 in Yayoi Sho |
Yayoi Sho
(Medium - 2000m) Classic Year Early Mar |
| Place top 5 in Satsuki Sho |
Satsuki Sho
(Medium - 2000m) Classic Year Early Apr |
| Place top 5 in Japenese Derby |
Japanese Derby (Tokyo Yushun)
(Medium - 2400m) Classic Year Late May |
| Place top 3 in Kikuka Sho |
Kikuka Sho
(Long - 3000m) Classic Year Late Oct |
| Place top 3 in Osaka Hai |
Osaka Hai
(Medium - 2000m) Senior Year Late Mar |
| Place top 3 in Takarazuka Kinen |
Takarazuka Kinen
(Medium - 2200m) Senior Year Late Jun |
| Place 1st in Tenno Sho (Autumn) |
Tenno Sho (Autumn)
(Medium - 2000m) Senior Year Late Oct |
| Place 1st in Arima Kinen |
Arima Kinen
(Long - 2500m) Senior Year Late Dec |
Agnes Tachyon"Life is an experiment, and we its guinea pigs. You, me, the other Umamusume—everyone!" | Voice Actress | Sumire Uesaka |
|---|---|---|
| Height | 159cm / 5'2" | |
| Weight | Refused measurement | |
| Birthday | Apr 13 | |
| Three Sizes | B 83 | W 55 | H 81 | |
| Equal parts researcher and runner, Agnes Tachyon pursues the limits of speed with the power of science. She will stop at nothing to quench her pure thirst for knowledge, performing all manner of experiments on living subjects—unauthorized, dangerous experiments, at that. Her extreme tunnel vision means that without someone to support her, day-to-day necessities quickly fall to the wayside. | ||
| Uniform | Racewear |
|---|---|
![]() |
Tach-nology |

| Height and Weight | Voice Actors | Three Sizes | List of Birthdays |
| 3-Star Characters | 2-Star Characters | 1-Star Characters |
Just got ‘Obtain Data!’ For the first time and chose the bottom option (throw in the towel), which gave 20 Power. Currently looks like the site has the results of ‘Tachyon the Spoiled Child’ repeated instead.
Agnes Tachyon (Tach-nology) Build Guide and Character Info



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please bring back the old formatting for the deck list. choosing to only display general cards with no explanation (and no replacements???) does not teach people why the cards are ideal for each character. choosing to exclude the URA finale scenario is restricting to the player (especially if they are new and find the cup overwhelming) and makes me want to use a different website.