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Seiya Kou
星野 光
Seiya Kō
Japanese: 星野 光
Romanji: Seiya Kō'
Aliases: Sailor Star Fighter
Residency: Kinmoku
Tokyo, Japan (briefly)

Idol (briefly), student (briefly)


Yaten Kou, Taiki Kou, Princess Kakyuu, Usagi Tsukino



Birthdate: July 30th ()
Age: 16
Gender: Female (Disguises as male)
Species: Kinmoku humanoid
Blood Type: A
Likes: The color red, ruby, hamburger, physical education, American football, Usagi Tsukino
Dislikes: Literature
First Appearance
Anime: A Goodbye and an Encounter! The Destiny of Flowing Stars
Anime Voiced By: Shiho Niiyama (Japanese)
Melissa Hutchison (English)
"I wish I could've met you sooner, Bunhead..."
— Seiya's words to Usagi before the Three Lights final concert in episode 195

Seiya Kou is one of the members of the Three Lights idol group, and is the civilian identity of Sailor Star Fighter. She is a student at Juuban Municipal High School, and the lead singer of the Three Lights.



Seiya has blue eyes and long, hip-length raven hair that he keeps tied in a low ponytail. As the leading vocalist of the Three Lights, Seiya is commonly seen wearing a red formal suit jacket with a navy blue long sleeved button-up shirt underneath with a yellow long tie at the collar, red formal pants and black shoes. Seiya also wears a pair of silver moon earrings on both of his ears. He sometimes handling the red rose during concerts or as a weapon when he threw the rose on Sailor Tin Nyanko to rescue Usagi as Eternal Sailor Moon from getting her star seed.

When he studies at Azabu Juuban High School, he wore a different school uniform like both Taiki and Yaten to differ the other male students wearing a standard male school uniforms.

He also wears various casual outfits when he hangs out with Usagi while he retains wearing his silver moon earrings. With the exception of his athletic attire where he is not wearing his silver moon earrings.


Sailor Star Fighter's height falls in the middle of the other Starlights. She has long black hair, which, like her comrades, is tied in a low ponytail and has blue eyes.

Her sailor fuku, identical to the other Starlights, is a black two piece outfit, consisting of a bikini-like top and hotpants. She wears knee-length boots and elbow-length gloves. She wears a golden beaded tiara, beaded belts on her waist and golden star earrings. Her secondary colour is light blue. She also wears a light blue belt-like choker and belt-like straps on her upper arm.


Seiya's personality was considerably lighter than that of the other two Starlights. He was much more childlike in his attitude, with a slightly prankish edge to his character, and there were brief moments when he was not thinking about his mission. He had a cheerful disposition and was much more easygoing. He was also more willing to become close to Usagi and her friends, while the other two Starlights mainly kept to themselves and originally refused to work with the Solar System Senshi at all. As mentioned by Taiki and Yaten, Seiya is also a sore loser.


Sailor Moon Sailor Stars

Seiya is first seen walking past Mamoru and Usagi, who are on their way to the airport. His attention is caught by Usagi, but then he walks away. He later sees Usagi in a shooting location and recognizes her when she was trying to get a good look at what's happening.

Seiya becomes more close to Usagi after the Three Lights joined her school. Over the course of the season's events, Seiya falls in love with Usagi. However, he is severely reprimanded by Taiki and Yaten, when he went as far as to risk his life for her. He becomes disturbed when he comes to know that Usagi has a boyfriend, however, after coming to know that Mamoru is overseas in America, he believes he has a chance with her. He often calls her Odango affectionately, just as Mamoru does. In episode 194, he helped Sailor Moon with a Tuxedo Mask-style thrown rose, and when that made her cry because she missed Mamoru, Seiya asked her if he was not good enough. In the next episode he confessed his love for her, admitting that he knew it was one-sided but nevertheless he thought he had to say it. He told her that he hoped she would be reunited with her boyfriend again soon, then kissed her on the cheek before bidding her farewell.

Sailor Star Fighter first appears in episode 173. She came to Earth along with the other Starlights to find their princess after their homeworld was destroyed by Sailor Galaxia. She became a student in Juuban High school, as well as the leader of the Three Lights, which becomes famous across Japan in her civilian form as Seiya Kou. They are initially seen in the airport where he saw Usagi was given a promise ring to Mamoru Chiba. Later, he meets Usagi when Taiki Kou is having a shoot with an actress which Usagi did not recognize him for seeing her in the airport. When the Taiki's partner and actress turns into a Phage by Sailor Iron Mouse, the trio transforms into their Starlights Senshi form and she was the one who snaps her fingers. They wanted to eliminate the Phage but Eternal Sailor Moon tells them not to stating that the Phage and the actress is the same person which it glows the crescent moon on her forehead. She manages to heal the Phage with Starlight Honeymoon Therapy Kiss. The Sailor Starlights notice her actions and acts as anti-heroines towards her. 

As time passes where she develops her feelinga for Usagi and her identity as Sailor Moon, Seiya becomes overprotected to Usagi even being kick out by both Taiki and Yaten for his actions. When Sailor Tin Nyanko targets Usagi for her star seed, Seiya along with Rei, Makoto, Minako and Ami are searching for her. By the time Eternal Sailor Moon defends herself from being attacked, Seiya saves her by throwing a red rose and injures Sailor Tin Nyanko which she recognizes Mamoru did as Tuxedo Mask. Seiya angrily tells her if she tries to attack her, he will stand and fight as he transforms into Sailor Star Fighter and unleashes her Star Serious Laser at Sailor Tin Nyanko, allowing Eternal Sailor Moon to hit her with her Silver Moon Power Kiss which it nearly hits her. After the incident when it rains, Usagi reveals that Mamoru wasn't receive any calls and message which she does not know thay her boyfriend was killed by Sailor Galaxia from the very beginning as well as the red rose that he threw earlier. Seiya comforts her and asks. "Am I not good enough?". With that he decides to find Mamoru for Usagi's sake. 

After Kakyuu was killed, she teamed up with her fellow Senshi and attacked Galaxia and stood beside Sailor Moon to protect her. After Galaxia was healed, Fighter returned with the other Starlights see Kakyuu was back to life along with thw inner and outer Senshi and watching Chibi-Chibi leave and stating the Light of Hope was in everyone's mind. After the incident he finally say goodbye to Usagi that she finally found her boyfriend back and he also tells Mamoru to protect before he transforms into Sailor Star Fighter and she with Sailor Star Healer, Sailor Star Maker and Kakyuu to restore their homeworld.

Senshi Info


  • Sailor Change Star
  • Sailor Star Yell


  • Fighter Star Power, Make Up


  • Star Serious Laser


  • In the first anime series, Seiya has one image song: The One-Sided Love as Far Apart as the Galaxy.
  • His hairstyle and appearance is a mixture of Mamoru Chiba and Haruka Tenou.
  • He is seen blushing the most of the Three Lights.
  • In the Materials Collection, Star Fighter Kick, Star Fighter Punch, Star Fighter Uppercut and Star Fighter Attack were additional attacks listed for Sailor Star Fighter, which were never used in any versions and was never specified what they did.


Sailor Senshi

Solar System Sailor Senshi Sailor MoonSailor MercurySailor MarsSailor JupiterSailor VenusSailor Chibi MoonSailor PlutoSailor UranusSailor NeptuneSailor Saturn
Sailor Starlights Sailor Star FighterSailor Star HealerSailor Star Maker
Other Sailor Senshi Sailor Chibi Chibi
Civilian Identities Usagi TsukinoAmi MizunoRei HinoMakoto KinoMinako AinoChibiusa TsukinoSetsuna MeiouHaruka TenouMichiru KaiouHotaru TomoeSeiya KouYaten KouTaiki KouChibi Chibi
Allies Tuxedo MaskLunaArtemisDianaPrincess Kakyuu

Solar System Sailor Senshi Sailor MoonSailor MercurySailor MarsSailor JupiterSailor Venus / Sailor V
Other Sailor Senshi Sailor Luna
Civilian Identities Usagi TsukinoAmi MizunoRei HinoMakoto KinoMinako AinoLuna Tsukino
Allies Tuxedo MaskLunaArtemis

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