Astronomer

Biodata

Feature	Information
Name	Astronomer (天文学家)
Alias(es)	Sea Star; King of Charisma 57 97
Species/Race	Uma Musume
Gender	Female
Affiliation	Hai Family; temporarily trained at Tracen Academy in Japan 78 80
Occupation/Role	European world-class racer
Status	Retired racer; the Breeders' Cup Turf was described as her retirement race 396 401
First Appearance	Chapter 51

Power Progression

Stage / Realm / Level	Chapter	Notes
World-class classic-year prodigy	53	Regarded as a future European or World Horse Queen, with talent surpassing an Arc de Triomphe champion.
Domain user — King of Charisma	57	Activates her Domain during the British Epsom Derby after recognizing Platinum as an opponent worthy of her full effort.
Heavy Track-adapted international contender	86	A month of early training in Japan lets her confidently race on the Japan Cup's Heavy Track.
Approaching historical level	394 396	Repeated competition against Platinum and Star of Kaido strengthens her beyond her classic-year self; she is described as approaching, or possibly reaching, historical level.

Background / History

Astronomer is the eldest daughter of Haidoushi and the older sister of Star of Kaido. Born into the prestigious Hai Family, she became Europe’s first world-renowned Uma Musume after Haidoushi and established herself as a world-class racer during her classic year. Her exceptional popularity and connections later became a major factor in the Hai Family’s rise among European noble circles. 53 277 312

Before the British Epsom Derby, Astronomer was overwhelmingly favored by European spectators. Her natural charm had allowed her to befriend many competitors before the race, and she entered with confidence bordering on complacency, having done little extra training. She expected only Star of Kaido to be capable of defeating her. 53 54 55 65

Her first meeting with Platinum Centaurea overturned those expectations. Astronomer’s Domain controlled most of the field, but Platinum resisted it completely and defeated her by eleven lengths. Although shaken by the loss, Astronomer recognized Platinum as a rival worth facing at full strength. 57 58 60

Afterward, Astronomer arrived in Japan a month early to adapt for the Japan Cup and seek revenge. She defeated Daiwa Scarlet in a training race, but again placed second behind Platinum in the Japan Cup. Her defeat did not end her rivalry; instead, it pushed her to train more seriously and pursue further international races. 81 82 86 90 91

Astronomer later followed Platinum into Dubai, where she finished third, then continued to race in Europe and America. She selected the Breeders' Cup Turf as the intended finishing touch to her career, only to learn Platinum had entered the same race. Despite expecting defeat, she chose to face Platinum one final time. 137 382 383

Appearance

Astronomer is a tall, striking black-haired Uma Musume with a clear, delicate face and a composed smile. Her elegance and natural charm draw attention even outside the racetrack. 54 120

• Long black hair.
• Tall, well-proportioned figure.
• Usually maintains a calm, faint smile.
• Wears elegant racing and Winning Live outfits; her training clothes were notably pristine before her British Derby defeat. 65 82
• Her Domain manifests as a sweet pink aura. 396

Personality

Astronomer is confident, observant, and socially gifted. Her unusual affinity makes other Uma Musume instinctively lower their guard around her, while her own calm demeanor lets her assess a race’s pace and opponents with precision. 54 56 312

Early in her career, she was somewhat lazy and overconfident. She believed that her Domain and natural talent made the British Epsom Derby effectively secure, and the immense potential of Star of Kaido made her feel that her own ultimate ceiling was already defined. 60 65

Defeats to Platinum gradually strengthen Astronomer’s resolve. Rather than surrendering when Platinum creates an overwhelming lead, she continues looking for a chance to respond and commits to showing her own racing style in her retirement race. 396 397

She is deeply protective of Star of Kaido and initially approaches Doctor Lin partly to investigate possible romantic rivals on her sister’s behalf. Over time, however, her concern becomes personal: she develops feelings for Lin and pursues a closer relationship with him herself. 80 96 121 137

Abilities & Skills

King of Charisma

Astronomer’s Domain converts her extraordinary Horse Mint affinity into overwhelming charm. It distracts and suppresses much of the field while improving her own racing performance. 58 396

• Greatly weakens opponents’ fighting spirit and desire to win.
• Slightly reduces affected racers’ speed, acceleration, and power.
• Draws opponents’ attention toward Astronomer, disrupting their judgment and pace.
• Increases Astronomer’s stamina consumption while active. 81 396
• Racers with strong Horse Mint can partially resist its effects. 58 396
• Platinum is effectively unaffected, making the Domain far less useful in their direct confrontations. 58 88 397

Horse Mint Physique

Astronomer possesses an exceptionally rare Horse Mint constitution, later characterized as the King of Horse Mint. Her presence naturally makes other Uma Musume feel refreshed, friendly, and inclined to approach her. 58 277 312

• Built a wide European network without deliberately trying to become a socialite.
• Earned immense popularity among racers, noble families, retired Uma Musume, and young prospects.
• Forms the foundation of the charm effect produced by her Domain. 54 58 277

Racing Ability

Astronomer is a highly adaptable front-running specialist with world-class physical ability, race sense, and pace control. 56 57 394

• Excels at securing strong inner-track positions and running near the front.
• Prefers stable, unchanging race rhythms.
• Can accelerate sharply in the final stretch.
• Prepared for the Japan Cup by arriving early to adapt to Japan’s distance and Heavy Track conditions. 57 59 86
• Her raw racing power is formidable, but Platinum’s repeated victories demonstrate that her Domain is her greatest comparative advantage. 125 126

Race Record

Event	Result	Notes
British Epsom Derby	2nd place	Lost to Platinum by eleven lengths, but finished several lengths ahead of third place. 60
Training race vs. Daiwa Scarlet	Victory	Won by five lengths after activating King of Charisma. 81 82
Japan Cup	2nd place	Arrived early to adapt to the track but was defeated by Platinum. 86 90 91
Dubai campaign	3rd place	Accepted the result after prioritizing her relationship with Doctor Lin over revenge through racing. 137
Breeders' Cup Turf	Defeated by Platinum	Activated her Domain at full strength but ultimately finished fifty lengths behind Platinum in her retirement race. 382 396 400

Relationships

• Star of Kaido — Younger sister. Astronomer is protective of her and investigates Doctor Lin’s possible love rivals partly for Star of Kaido’s sake. 77 80 83 96
• Haidoushi — Mother and former Arc de Triomphe champion. She chastises Astronomer’s lack of training after the British Derby, but later comforts her after the Japan Cup loss. 65 109
• Platinum Centaurea — Primary racing rival. Astronomer lost to her repeatedly, yet respects Platinum’s power and regards their encounters as a karmic entanglement. 60 116 366 401
• Lin Anran / Doctor Lin — Doctor, romantic interest, and intended future connection to Europe. Astronomer repeatedly invites him abroad, secretly dates him in Dubai, and continues pursuing him afterward. 93 121 137 241 244
• Daiwa Scarlet — Japanese training-race opponent. Astronomer defeated her by five lengths shortly after arriving at Tracen Academy. 81 82
• Tokai Teio — Japan Cup rival and one of the first Uma Musume listed in Astronomer’s investigation report concerning Doctor Lin. 80 82
• Agnes Tachyon — Another Japan Cup contender whom Astronomer identifies as a potential threat in her investigation report. 83 96

Story Role / Major Arcs

British Epsom Derby

Astronomer enters as Europe’s overwhelmingly popular favorite and initially expects an easy victory. Her clash with Platinum reveals the limits of her confidence: Platinum ignores King of Charisma and wins by eleven lengths. 54 58 60

Japan Cup Challenge

Seeking revenge, Astronomer relocates temporarily to Japan, trains at Tracen Academy, defeats Daiwa Scarlet in a practice race, and prepares specifically for the Heavy Track. She finishes second to Platinum, but ranks ahead of other major contenders. 78 81 86 91

Doctor Lin Investigation

Astronomer begins documenting potential “sneaky flirt” or “homewrecker” threats around Doctor Lin for Star of Kaido. Her reports eventually include Tokai Teio, Agnes Tachyon, and Platinum, though her own interest in Lin steadily becomes the true focus. 82 96 97 137

Dubai and European Campaign

She joins the Dubai field both to race Platinum again and to observe Platinum’s connection with Doctor Lin. Following her third-place result, Astronomer accepts that racing revenge against Platinum is unrealistic and shifts her focus toward Lin. 116 124 137

Breeders' Cup Retirement Race

Astronomer switches to the Breeders' Cup Turf because turf middle distance is her specialty, hoping to end her career with a major victory. Platinum’s late entry turns the event into their final confrontation; Astronomer activates her Domain at full power but is defeated by fifty lengths. 382 383 396 400

Notable Quotes

“Sorry, but you're not Platinum. Then... let's make this quick!” 81

“Very well, let me see your true full strength, Heavenly Horse.” 396

“Platinum... that monster, she's really getting scarier and scarier.” 229

Trivia

• Astronomer’s Domain aura is pink rather than the more intimidating colors commonly associated with powerful Domains. 396
• Her popularity at the British Epsom Derby was so overwhelming that other racers and idols publicly supported her. 55
• Platinum’s Hall of Fame contains three Astronomer statues, reflecting their repeated high-profile races. 401
• Astronomer is described as one of the Uma Musume who has lost to Platinum the most times in the world. 366