On 20 January, Rika released her first music cover, of "Touch" (タッチ) by.
On 23 January, Rika announced on Twitter that the VOD of her debut stream had been restored.
On 28 January, the 7 Livers who made their debuts the previous week held their first full group collab stream on Kuramochi Meruto's channel. During this stream, they revealed their unit name for the first time: Idios.
On 3 February, Rika reached 50,000 subscribers on her YouTube channel.
On 5 February, Rika's YouTube channel became open for monetization.
On 13 February, Rika's YouTube channel became open for channel membership.
On 28 February, VTuber Style magazine's March issue went on sale, featuring an interview with the members of Idios.
On 24 June, it was announced that Rika would be a coach for the 2023 edition of NIJISANJI Koshien, NIJISANJI's annual summer event and tournament featuring games in the franchise. She coached the Sei Azarashi Gakuin Kōkō (聖アザラシ学院高校) team during the tournament, which ran from 1 July to 13 August (with an exhibition match taking place on 19 August).
On 9 July, Rika debuted her second 2D outfit.
On 10 July, Rika's official fanclub was opened.
On 15 July, Rika reached 100,000 subscribers on her YouTube channel.
On 16 July, Idios held a stream on Rika's channel to celebrate their half-anniversary since debut. During this stream, they announced the release of their line of half-anniversary goods as well as their first group cover, of halyosy's "Connecting".
On 28 July, magazine announced that Rika, along with the other coaches and organizers of NIJISANJI Koshien 2023, would be featured in its 1078th issue as well as on its back cover; the issue was released on 3 August.
On 17 August, Rika opened a personal TikTok account.
At NijiFes 2023, which was held from 23 December to 24 December, she was the MC for the "Mezase Ichininmae!" Shinjin Dakkyaku Challenge stage on Day 2.
