Kuzuha

Kuzuha debuted as an independent VTuber on 8 March 2018,^[5] before being scouted by Anycolor (then-Ichikara) and officially become part of Nijisanji's gamer branch "Nijisanji Gamers" from July 30.^[6][7] He was the first VTuber to be scouted by the company.^[8] The branch was later dissolved in December 2018 and the members now referred to as "EX-Gamers."^[1]

He was featured along with fellow VTuber Shibuya Hal [ja] in the special edition of Anan's 2318th issue (released in October 2022). This marks the first time for VTuber to be featured as cover of the magazine.^[9]

Kuzuha's character is a 100+ years old vampire who doesn't drink blood; his real name is "Alexander Lagusa" (アレクサンドル・ラグーザ).^[10][11] He is a NEET gamer who started streaming to make easy money.^[12] Kuzuha is capable of transforming himself into a girl called "Sanya" (サーニャ), but admitted that it "takes a lot of his magic power" so she doesn't appear much.^[13]

Kuzuha is known for streaming his gameplay for long periods. He would start streaming between 9 and 11pm (JST) for about 6 to 10 hours for almost every day. He is also noted for his proficiency in gaming skills and his intriguing word of choice during live commentary and conversation. Despite this, many people who have directly involved with him reveal that Kuzuha is very shy towards new people and doesn't talk as much as he does in streams.^[14]

Kuzuha released his first original song on September 28, 2021, through digital single "Contrail" (コントレイル), which he involved with the lyrics.^[15] It topped the Billboard Japan in downloaded song category.^[16] He held his first solo live event on November 10 (his birthday) where he announced his major debut under Virgin Music as well the release of album "Sweet Bite".^[17] In 2023, he released a single "Black Crack." The lead song was used as opening song for anime Good Night World.^[18]

As utaite, his most popular cover would be King, a song by Kanaria. The cover has exceeded 53 million views as of June 2025.^[19]

On June 11, 2025, he held his first solo live stream concert to commemorate the 2 million subscribers milestone which he achieved in June 3. He was the first Japanese male VTuber and the first in Nijisanji to achieve this milestone. The concert, lasted for about an hour, included celebration messages from famous streamers he's been involved with, including Ryosuke Yamada.^[20] He also announced the release of his second digital single "Gimmie More" (ギミモ), which was written and composed by Nqrse.^[21]

Along with Kanae, another VTuber from Nijisanji, Kuzuha and Kanae has been known as Chronoir^[a] even before the former officially joined Nijisanji.^[b][10] The duo streamed let's play content together, and also appeared in events as singers. Kanae personally reached out to Kuzuha, who has played a lot with him, because there were not many male VTuber units during that time.^[22] The unit name was chosen among viewer's submission, which contains the Japanese and French for the word "black," both Kuzuha and Kanae's favorite color.^[23] Chronoir also perform as a duo signed under Nijisanji Records until 2024, where they moved to AccelNotes afterwards. The unit opened their official YouTube channel on December 31, 2019. A weekly program called "Chronoir Does Something" (くろのわーるがなんかやる, Kuronowaru ga Nanka Yaru) started in 2022.^[24]