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In July 2019, 株式会社WACTOR was officially established as a company. On 3 October, WACTOR announced auditions for two new members for Mirais unit (みらいず Miraizu) and four new members for Sister unit (姉妹ユニット Shimai yunitto). On 25 October, Otogi Lilu announced her retirement via Twitter. She graduated on 16 November. Eventually, the Sister Unit members debuted: Komori Aina on 28 October, Mashiro Yuyu on 7 November, Mihana Rio on 9 November, and Tsukito Hana on 11 November. On 20 November, Kogure Piyoko debuted as part of Mirais. On 12 December, Mihana Rio's contract was cancelled due to an undisclosed breach of contract. On 15 December, Mitsurugi Lia debuted as part of Mirais.

On 11 January, Irisu Mia announced her retirement via Twitter, and graduated on 29 February. On 28 January, WACTOR introduced Nanaha Rui, their first Bilibili-exclusive VTuber. On 2 February, Kokoro Ichiru debuted as part of Sister unit. On 12 March, WACTOR's Twitter account posted a statement regarding the unauthorized deletion of new member data in the company's cloud storage, and it was found that one of the many IPs involved belonged to a former employee. At the same time, Komori Aina's and Mashiro Yuyu's contracts were cancelled due to breach of contract. As of this date, Mirais and her sister unit were merged to form one group simply called "WACTOR". On 28 September, Kokoro Ichiru's activities were temporarily suspended. After a long hiatus, the cancellation of her contract was announced on 28 December due to management issues. At some point in 2020 (presumed late December), archives on graduated Otogi Lilu's and Irisu Mia's channels were wiped, leaving their respective Twitter accounts the only official way to view their stream logs.

Throughout January and February, WACTOR's talents began expanding towards Spanish-speaking fanbases, which caused a sudden surge in subscriber numbers., On 16 January, Miu was the first to publish a presentation video in Spanish, followed by Lia on 19 January, Hana on 24 January, and Piyoko on 10 February. On 17 March, WACTOR's Twitter account announced auditions sponsored by bilibili for five new members, from 17 March to 5 April. Throughout May, the new members (now known as second generation) debuted: Shino Laila and Hoshina Suzu on 9 May, Kurari Rose on 18 May, and Hina Misora on 25 May. One of the five models shown did not debut. On 16 June, WACTOR's members were re-organized into generations (0th, 1st, 2nd) according to their audition and debut date. On 30 June, WACTOR announced auditions for a third generation and opened early registrations. On 12 July, Kogure Piyoko's activities were suspended. On 31 July, WACTOR was ranked 8th among the top 10 Japanese VTuber companies with the most overall subscribers. The company also officially announced the start of the third generation auditions and shared the three models of its members, one of which was originally shown during the previous auditions. Throughout late 2021, the third generation debuted: Sumeragi Pal on 12 September, Rurine Luna on 15 September, and Inumaki Himari on 15 October. On 1 November, after a long vacation, Kogure Piyoko announced her retirement, and graduated on 26 November. On 28 November, Shino Laila was suspended indefinitely due to breach of contract. On 23 December, WACTOR announced auditions for a fourth generation sponsored by Bilibili. The new "fantasy"-themed generation is called "GATE" and is comprised of five new members. On 27 December, after several management issues about uploading a collaboration video of Suzu and Nyaru, WACTOR temporarily suspended Suzu's activities as a protective measure. On 28 December, Nanaha Rui announced his retirement.

On 28 January, Tsukito Hana's accounts ceased all activity. In late February Hana decided to cancel her contract with the company due to health reasons. On 29 January, Nanaha Rui graduated from WACTOR. In February, WACTOR 4th Generation first members debuted: Saohime Yue on 20 February and Shinonome Ito on 26 February. On 2 March, WACTOR caused a controversy when they revealed in a statement the real name of one of their talents who had been suspended since November 2021. The statement announced the filing of a lawsuit against the person in charge of Shino Laila. On the same day, Kurari Rose was suspended due to an undisclosed breach of contract. Shino Laila's and Kurari Rose's contracts were canceled by March. Eventually, the other members of the 4th generation make their debuts: Himea D'Almaria on 14 March, Kuuma Mireille on 16 April, while Yukinoshita Mimi postponed her debut date due to personal circumstances. On 5 May, WACTOR announced auditions for an all-male generation of VTubers, a first for the agency. On 9 May, Hoshina Suzu announced her retirement, and graduated on 29 June. On 13 July, the 4th generation member who postponed her debut announced her name change to "Lea", and debuted on 16 July. Around mid-year, the fifth generation or also called GAMERS debuted: Nemurime Charo on 22 July, Kumaboshi Mahiru on 29 July, and Himeragi Ageha on 3 August. On 3 August, WACTOR's Twitter account reported that Lea is absent due to illness. On 3 September, a tweet on the official WACTOR account announces a new WACTOR ES 1st GEN audition for Spanish-speaking members. On September 17, a new tweet revealed silhouettes for 3 members. On 27 September, Sumeragi Pal announced her retirement, and graduated on 30 October. On 8 October, WACTOR debuted its first all-male generation, WACTOR Boys, comprised of Vyse Yagami, Ayato Galilei and Leo Valentino. On 8 October, Inumaki Himari announced her retirement, and graduated on 26 November. On 18 October, WACTOR's twitter account announced WACTOR Boys 2nd-Generation audition with pre-entry session, and unveiled the designs for two members on 25 December. On 8 November, Saohime Yue's activities were suspended for health reasons. On 12 November, WACTOR's Twitter account announced WACTOR ID 1st-gen audition for their new Indonesian branch with pre-entry session. On 15 November, WACTOR start auditions for their new Chinese branch WACTOR CN 1st-Gen and unveiled the designs for three new members. At the end of the year, WACTOR ES 1st-Gen members debuted: Neon Kuroyuri on November 27. and Sezia Haruma on December 18 One of the three unveiled models did not debut.

On 3 January, WACTOR revealed the designs for 3 members of their new branch WACTOR ID. On 23 January, Usami Mina (兔美咪奈) debuted as first member of WACTOR CN and Bilibili-exclusive VTuber. On 28 January, Nekomiya Yumi (猫宮悠米) debuted as part of WACTOR CN. Throughout January, several members suddenly ceased all activity on their accounts. Hina Misora's last tweet was on January 1. Luna Rurine's last tweet was on January 24. And on January 31, Neon Kuroyuri held her last stream, arguing she's fine. Later, she vanished. Her viewers and fans were concerned and speculated that she might have been forced to stream and to say those words. On 9 February, Hina Misora's contract was canceled. On 27 February, WACTOR's Twitter account announced that Mitsurugi Lia would leave the agency and continue her activities as an independent VTuber. On 28 February, WACTOR caused a controversy again when they exposed confidential information about former member Hina Misora. WACTOR posted her personal information (full name, country, city and personal identification) on the Official Wactor Page and Hina's Twitter and also published a video on YouTube revealing the same information. Fans would report the video and Tweet for violating community guidelines on cyberbullying, leading to both being taken down, but the company would double down by posting this same information on the descriptions of her streams.

On 28 February, 910inc announced through a press release that an upcoming talent named DevilNyaa has joined the agency and was preparing to debut soon. On 1 March, 910inc announced Yoruno Ruki's retirement. The announcement states that she and the company have been receiving death threats and other kinds of harassment recently, and they concluded that it would be difficult for her to continue streaming, so her retirement was decided. There was no graduation stream or other final activity conducted out of concern for her safety. On 9 March, the DevilNyaa scandal broke out after DevilNyaa came out with a statement, publicly announcing that she had decided not to join the agency. On 16 April, Umiboshi Clara announced that she was graduating from 910inc. On 15 April, Saohime Yue's account uploaded a new video, with a new voice actress explaining that the original voice for Yue had been replaced and that the original voice agreed to it, despite the fact that she had been inactive since 2022. On 25 April, a recasted Saohime Yue re-debuted under 910inc as "Sahohime Yue" (佐保姫ユエ). On 30 April, Umiboshi Clara held her graduation stream and retired. On 8 May, Powari Poachi announced that she was transferring from 910inc agency membership to 910inc MCN affiliation, officially returning to independent status and becoming an affiliated indie content creator, similar to Hizuki Miu. As of 10 June, retired member Yoruno Ruki's channel has apparently been terminated by YouTube. When viewed through a Wayback Machine snapshot from 28 April, the channel did not have any public videos at all, with no changes by the next snapshot on 19 May, which raises questions on why and how a retired member's inactive channel with no viewable content would still get terminated. Her channel joins several other retired members channels which also got terminated, apparently due to a violation of YouTube's Terms of Service. On 14 July, the 910inc official Twitter retweeted a post from a new Twitter account belonging to the agency, named "Towa Fiona" (兎和フィオナ). The post contained a clip of the retired Tsukito Hana's 2D model doing tongue twisters with a new voice. On the same day, Tsukito Hana's YouTube channel also changed its name to Towa Fiona and posted an upcoming debut live stream scheduled for 20 July. On 20 July, a recasted Tsukito Hana re-debuted under 910inc as "Towa Fiona" (兎和フィオナ). On 3 August, 910inc and its parent company WACTOR Inc. announced VTuber auditions for a new character named "Fa Ponko" (ファ・ポン子), who is the mascot/poster girl of FAPON, their online character merch lottery service. On 30 August, WACTOR Inc. announced that it has won a favorable judgment from various courts for 4 of its lawsuits against former members in Japan and other countries. The press release also states that the 4 defendants will be ordered to pay a combined sum of 10 million yen. On 31 August, MCN affiliate Hizuki Miu announced her retirement from her VTuber activities, while also returning her character IP, channels and social media accounts to the agency. On 1 September, 910inc teased the upcoming debut of a new member using the retired Nemurime Charo's 2D model. They also retweeted a post from a new account belonging to the agency, named "Tokimeku Nova" (時巡ノヴァ) which will be the name of the new member. On 12 September, a recasted Nemurime Charo re-debuted as "Tokimeku Nova" (時巡ノヴァ) with a new YouTube channel, since the original Charo's channel had been terminated by YouTube. On 20 October, Beniiro Lays announced that she would be graduating on 31 October. On 31 October, Beniiro Lays held her graduation stream and retired. On 26 December, 910inc announced Towa Fiona's retirement (effectively terminating the talent behind the character) after claiming that they have lost contact with the talent, listing a number of incidents to serve as context to their decision to retire her.

On 13 January, 910inc announced the end of Powari Poachi's MCN affiliation contract, returning her to unaffiliated independent status. On 28 January, the AVTuber agency H.LIVE announced a collaboration with WACTOR Inc.'s FAPON character merch lottery service, adding their VTuber goods to the lottery's pool of prizes. As of 6 February, the official 910inc YouTube channel has apparently been terminated by YouTube for violating their Terms of Service. Their official Twitter/X account has also been rebranded from 910inc (@910inc) to FAPON (@fapon_kuji).