Sato was already self-isolating after not feeling good
The agency for voice actor Rina Sato, who is best known for voicing Mikoto Misaka in A Certain Magical Index and A Certain Scientific Railgun, Sailor Mars in Sailor Moon Crystal, and Makoto Niijima in Persona 5, announced on January 27 that the prolific voice actor had tested positive for COVID-19. Sato confirmed the news on her Twitter account, saying that her condition is stable and she's currently resting.
体調が優れず、念のため自主隔離に入っておりましたが、本日PCR検査にて陽性が確認されました。— 佐藤利奈 (@rinasatoh) January 27, 2022
Official agency photo of Rina Sato
Sato mentioned that she had been feeling unwell and so she had been self-isolating for the past few days ahead of getting a PCR test. After being administered the test, she was told today that she had tested positive. Both Sato and her agency, The Tokyo Actor's Consumer's Cooperative Society, an agency and collective for talent, apologized for the inconvenience that this has caused.
Source: Rina Sato on Twitter
Daryl Harding is a Japan Correspondent for Crunchyroll News. He also runs a YouTube channel about Japan stuff called TheDoctorDazza, tweets at @DoctorDazza, and posts photos of his travels on Instagram.