Runa Narumi, who voices Yuika Mitsumine from The Idolm@aster Shiny Colours, is due to have her voice lines removed from the game. Twitter user @iwbjp tweeted an image of the in-game announcement which delivered the news:
2022年1月に三峰結華のCV交代のお知らせがありそう。🎙
> 今回追加されるコミュの三峰結華のボイスは未実装となります。 #シャニマス #三峰結華 #成海瑠奈 pic.twitter.com/2y0zn3TvVh— iwbjp (@iwbjp) December 10, 2021
The highlighted line in green states that Yuika Mitsumine will not have a voice for the latest event. According to the tweet, the complete removal of the voice will happen on January 2022. There is no news of a replacement of Runa Narumi, who voices the character. UPDATE 29/12/2021: The Idolmaster website has announced that a new voice actor for Yuika Mitsumine is currently in the process of being selected.
Narumi was the subject of harsh criticism on Japanese social media after allegedly cheating on Mokou, her YouTuber boyfriend. Apparently, the individual whom she was cheating with had a girlfriend who proceeded to bring the scandal to light back on October 10, 2021. The hashtag リアルNTR (Real NTR) trended on Japanese Twitter as a result. For a full breakdown of these events, check out this Reddit comment from u/Cloud668.
On October 15, Narumi, who was also a member of the idol group SoundOrion had suspended her activities, according to a notice from her agency, Stardust Promotion.
Besides Yuika Mitsumine, Narumi also voiced Lymee, the slime girl that appears in episode 3 of the Interspecies Reviewers anime, as well as Erika, from KonoSuba: Fantastic Days, a gacha game. While there is still no announcement regarding the status of Erika’s voice in the game, it is largely expected that her voice will be removed as well.
It isn’t uncommon for gacha game characters to lose their voices due to controversies involving their voice actors. Last month, Tatsuhisa Suzuki who voices Regal from Alchemy Stars, was replaced by Shintaro Asanuma for allegedly cheating on his wife, award-winning singer LiSA. Earlier, another high-profile voice talent, Ai Kayano, also had her voice removed from several gacha games not because of cheating—but because she visited a controversial war memorial.