Hakui Koyori

Hakui Koyori (Japanese: 博衣こより) is a Japanese VTuber affiliated with hololive of Hololive Production, debuting in 2021 as a member of its sixth generation, Secret Society holoX. She is known for the very high frequency of her livestreams and video uploads.

Profile

Item	Detail
Debut	November 28, 2021
Birthday	March 15
Agency	Hololive Production (hololive)
Generation or unit	Sixth generation, Secret Society holoX
Fan name	Koyori no Joshu-kun (Koyori's Assistants)
Character designer	Momoco

Career

Hakui debuted on November 28, 2021, as part of Secret Society holoX alongside La+ Darknesss, Takane Lui, Sakamata Chloe, and Kazama Iroha. Her character, designed by Momoco, has pink hair and coyote ears and is presented as the group's researcher in charge of research and development. Her first official merchandise went on sale in March 2022, she received a 3D model in June 2022, and she uploaded her 500th YouTube video on September 11, 2022. She reached one million YouTube subscribers on September 24, 2023.

In 2023 she took part in the creation of "AI Koyori", an artificial intelligence with her appearance and voice, after expressing interest during an internal review of possible AI uses at Hololive. She supervised the project and supplied 3,000 sentences of her speech as training data. Her other work includes an appearance in the manga HoloX Meeting, a children's audio guide at the Hakone Venetian Glass Museum with Juufuutei Raden from January to July 2025, a monthly column in Famitsu from July 2025, and voice roles as Ikuhara Yume and Tinkermon in episode 19 of Digimon Beatbreak in February 2026. In September 2026, Entergram announced a visual novel starring her, Koyorenium, supervised by Hakui.

Activities

Streaming style

Hakui hosts a regular morning program, "Asakoyo", lasting about an hour. Her streams cover a wide range of video games, notably retro titles and Soulslikes, while she has limited experience with FPS games. She rarely misses a day of streaming in a month; Stream Charts estimated she streamed for 1,914 hours in 2023. During Golden Week 2023 she held "Konkoyo24", a 24-hour stream that introduced the talk segment "Discord Shocking", in which each guest introduces the next. A baseball fan, she hosted a Powerful Pro Yakyu tournament in November 2025 and called play ball at the Japan versus Czech Republic match of the 2026 World Baseball Classic, an appearance that drew mixed public reactions.

Music and works

"Wao!!" (2022), first single, written and composed by Deco*27
"Girls seeks Q.E.D.", a single themed around her researcher character
"New Journey" (2024), seventh single, released at her March 15, 2024 3D concert
First Step (2025), first album, released on March 15, 2025
"Kanseitouyori" (2026), single released on March 28, 2026
Chemical Spark (2026), second album scheduled for December 2, 2026

Characteristics

Hakui presents herself as the self-proclaimed brain of holoX, greeting viewers with "Konkoyo" and calling her fans assistants. She regularly holds birthday concerts on March 15, has performed acoustic-only shows, and releases covers of both classic and trending songs. She was also a member of the music group Blue Journey, and her first in-person concert is scheduled at Tokyo Garden Theater on December 22, 2026.