is a Japanese VTuber affiliated with Hololive Production. She made her debut on November 28, 2021. She is known for the high-frequency with which she livestreams. Hakui released her first album, First Step, in 2025, and her second album, Chemical Spark, is set for release in December 2026. Career Hakui Koyori is a member of Hololive's sixth generation, Secret Society HoloX, alongside , , Sakamata Chloe, and . She made her debut on November 28, 2021. Her character was designed by the illustrator Momoco, featuring pink hair and coyote ears. In her lore, she is described as HoloX's researcher, with her fans being called her assistants, and her character's birthday is March 15.
She regularly hosts a morning program, "Asakoyo", that is about an hour long. Her livestreams feature her playing a variety of video games of varying lengths. Many of the games she plays are retro games or Soulslikes, and she does not have lots of experience with FPS games. In June 2022, Hakui gained a 3D model. Hakui reached one million subscribers on YouTube on September 24, 2023.
Hakui is known for the very-high frequency with which she livestreams and releases videos. It is rare for her to not have livestreamed on every day of a given month. For instance, in the first 20 days of August 2024, an undercount found that she had done 35 livestreams, and an undercount also found that she had held 352 livestreams at that point in the year. On September 11, 2022, Hakui uploaded her 500th video to YouTube. The analytics website Stream Charts estimated that she streamed for 1,914 hours in 2023. As of September 2026, Hakui had released over 3,400 YouTube videos. During Golden Week in 2023, Hakui debuted "Konkoyo24", a 24-hour livestream. The livestream also saw the debut of a talk show "Discord Shocking", which features a different guest introduced by the previous guest.
Music Hakui's first single, "Wao!!", which was written and composed by Deco*27 and arranged by Rockwell, was released on June 17, 2022. Her second single, "Girls seeks Q.E.D.", is themed around her researcher character, featuring pi in its lyrics, and its title features the science initialism Q.E.D. She held a live concert to coincide with her character's birthday on March 15, 2023, first performing her singles "Shijyo Saidai no Question!" and "Egoistic Seesaw" at the concert. At a concert to coincide with the 2nd anniversary of her debut on November 28, 2023, she first performed her singles "Unbalance" and "Tear-Gazer". She was also part of the music group Blue Journey. She has also released many cover songs, which include classics and trending songs. She has also held concerts with only acoustics. On March 15, 2024, to coincide with her character's birthday, she performed at a 3D concert that included appearances by Rica Matsumoto, and released her seventh single "New Journey".
She held an online concert on April 7, 2024, as part of a collaboration with Nissin Cup Noodles. Hakui's first album, First Step, was released on March 15, 2025, the same day she held a 3D concert, to coincide with her character's birthday. On March 28, 2026, she released the single "Kanseitouyori". Hakui's second album, Chemical Spark, is themed around her character as a woman in science and it is set to release on December 2, 2026. Hakui's first in-person concert is set to take place at on December 22, 2026.
Baseball Hakui is a fan of baseball. In November 2025, Hakui hosted a tournament on the baseball simulator Powerful Pro Yakyū 2024 - 2025 that reached over 120,000 concurrent viewers on her channel. At the 2026 World Baseball Classic (WBC), Hakui called play ball at the Pool C match between Japan and the Czech Republic. Japan won the match 9-0. She also simulcast some WBC games. Some netizens blamed Hakui for Japan's defeat in the WBC quarterfinals, the match following her call, and others also criticized her involvement, as a VTuber, in the WBC. These reactions were referenced and parodied by the comedian Soshina in a skit, which itself contributed to the polarization regarding Hakui's involvement.
Artificial intelligence She has also created content centered on an artificial intelligence known as "AI Koyori". AI Koyori was created in 2023, after Hakui expressed interest in amid an examination by Hololive of possible uses of AI. She supervised its creation, supplying 3,000 sentences of her speech for its training data, and the AI has her same appearance and voice. Its text-to-speech functions utilize ChatGPT.
Other work Hakui's first official merchandise was released for sale in March 2022. She also appeared as a character in the manga HoloX Meeting. Hakui provided the children-oriented audio guide at the with Hololive-affiliated VTuber Juufuutei Raden from January to July 2025. In July 2025, a monthly column in Famitsu written by Hakui began syndication. In September 2025, Hakui announced that she was the subject of a research project by a Japan Tobacco research group focused on voice. Hakui voiced the characters Ikuhara Yume and Tinkermon in episode 19 of Digimon Beatbreak, which was released in February 2026. In September 2026, Entergram announced that they were developing Koyorenium, a visual novel starring Hakui which was also supervised by her. Entergram has previously produced visual novels starring Hololive members Minato Aqua and Nekomata Okayu.
Discography Studio albums As lead artist Title Album details Peak chart positions Sales JPN JPNComb. JPNHotFirst Step Released: March 15, 2025 Label: Cover Corp. Formats: CD, digital download, streaming1214—JPN: 12,053Physical (11,476):
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Digital (577): Chemical Spark To be released: December 2, 2026 Label: Cover Corp. Formats: CD, digital download, streamingcolspan="4" "—" denotes releases that did not chart. As Secret Society HoloX Title Album details Peak chart positions Sales JPN JPNComb. JPNHotSecret Order Released: April 8, 2026 Label: Cover Corp. Formats: CD, digital download, streaming710—JPN: 10,665 "—" denotes releases that did not chart. Singles As lead artist TitleYearPeak chart positionsAlbumJPNDig.JPNDL"Wao!!"20222220First Step"Girls seeks Q.E.D." (乙女よ求めよQ.E.D.)5042"Shijyo Saidai no Question!" (史上最大のQUESTION!)20232819"Egoistic Seesaw" (エゴイスティック・シーソー)3131"Unbalance" (アンバランス)4144"Tear-Gazer"4748"New Journey"2024——"Decorate" (デコレート)—70"Shiawase√Koyorinium" (シアワセ√コヨリニウム)——"Sukideka!!~BigLove????~" (スキデカ！~スキはデカく回顧録？~)2025——Secret Order"Baku Love Chemistry" (爆ラブ＋ケミストリー)——Chemical Spark"Kanseitouyori" (管制塔より)2026——"NaN Game"——"Pink Ni Nattyae" (ピンクになっちゃえ)—92 "—" denotes releases that did not chart. As Secret Society HoloX TitleYearPeak chart positionsAlbumJPNDig.JPNDL"Jouya Repaint" (常夜リペイント)2022—52Secret Order"Labyrinthine Labyrinth" (迷宮なラビリンス)2023——"Kyouen Solidarity~Shake★Nabe~" (饗宴ソリダリティ~SHAKE★NABE~)——"Cho Yume Dodekkai!" (ちょ〜ゆめドデッカい!)2024——"Gyoukou Chronicle" (暁光クロニクル)48—"Gyouan Xdeath" (暁闇エクスデス)2025——"Watcha Gatcha!!!!!!!!"2026 — — "—" denotes releases that did not chart.
As collaborative artist TitleYearPeak chart positionsAlbumJPNJPNComb.JPNDL"Tonde K! Hololive Summer" (飛んでK！ホロライブサマー)(as Hololive Idol Project)2022 — — 37Hololive Summer 2022 "Our Bright Parade"2023——18rowspan="6" "Mizutamari"(as Blue Journey) 2 44 —"Merry Holy Date"(as Hololive Idol Project) — — —"Can You Do the Hololive? (Hololive Super Expo 2024 ver.)"(as Hololive Idol Project)2024 — — — "Get the Crown" — — 36 "Beep Beep"2026 18 — — "—" denotes releases that did not chart.
See also
Neuro-sama, AI VTuber
References
Notes
External links