On 12 January, VOLTACTION announced that that all four members would receive their second 2D outfits, and would reveal them via a stream relay with 30 minutes allotted for each member. The relay was held in the same order as their debut streams with Hibari going second, revealing his second outfit at 23:00 JST that same evening.
On 13 January, VOLTACTION celebrated their half-anniversary since debut by releasing their second original song, "Watercolor". The song was written and produced by the band. During a celebration stream for their half-anniversary held on the same day, they also announced the release of their second voice drama, "undertake any request", which was released that evening.
On 28 January, Hibari reached 250,000 subscribers on his YouTube channel.
On 25 April, Hibari opened a personal TikTok account.
On 26 April, VOLTACTION announced a 3D model debut stream relay, with Hibari as the second person to have have his 3D model debut on 12 May.
On 12 May, Hibari reached 300,000 subscribers on his YouTube channel during his 3D debut stream, which peaked at over 111,000 concurrent viewers. During his 3D debut, Hibari also announced his first solo original song, "skylark", which was released at midnight the following day. The song was written and produced by Horie Shota, also known as kemu.
On 24 June, it was announced that Hibari would be a coach for the 2023 edition of NIJISANJI Koshien, NIJISANJI's annual summer event and tournament featuring games in the franchise. He coached the Kaitou Gakuen Kōkō (快盗学園高校) team during the tournament, which ran from 1 July to 13 August (with an exhibition match taking place on 19 August).
On 5 July, VOLTACTION announced that they would be celebrating their first anniversary since debut with a live 3D concert, "RAISE the VOLTAGE", which was streamed for free on the group's YouTube channel on 15 July. At the concert, they debuted their third original song, "RELOAD!!!!", which was written and produced by OSTER project. They also announced the release of the "Memories of Nostalgia" series of voice dramas over the course of the following months, each of which are set during VOLTACTION's formative years at Erfolg College and focuses on a different member and their respective backstories/lore; the first, "Seraph Dazzlegarden-hen", was released shortly after the concert.
On 13 July, VOLTACTION opened an official Instagram account.
On 23 July, magazine revealed that VOLTACTION would be featured in its 2359th issue as part of its NEXT Generation 2023 segment, which was released on 2 August.
On 28 July, magazine announced that Hibari, 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 1 August, the formation of a band composed of NIJISANJI Livers (later formally named 2-ji Datoka) was announced during a joint band session live stream between Hibari and Fuwa Minato, with the other members (Ibrahim, Lauren Iroas) being revealed in subsequent videos uploaded on Fuwa's channel.
On 19 August, Hibari reached 350,000 subscribers on his YouTube channel.
On 23 October, VOLTACTION's second "Memories of Nostalgia" voice drama, "Shikinagi Akira-hen", was released.
On 1 November, announced that VOLTACTION would be interviewed and featured in the magazine's December issue.
From 4 November to 11 November, coinciding with the second anniversary of their VTA debuts, the 8 former members of VTA's first generation who ultimately debuted with NIJISANJI held the Ano 8-Nin Nayutan Medley (あの8人でナユタンメドレー), a cover relay in which each member sang a different NayutalieN song. Hibari released a cover of "Newton Dance" (ニュートンダンス) on 11 November as part of this relay. The relay concluded with a cover of "Alien Alien" (エイリアンエイリアン) by the full group on 12 November.
On 13 November, VOLTACTION's third "Memories of Nostalgia" voice drama, "Watarai Hibari-hen", was released.
At NijiFes 2023, which was held from 23 December to 24 December, 2-ji Datoka held their first live as part of MUSIC GARDEN Day 1. On Day 2, Hibari took part in Day 2 of NIJISANJI 5th Anniversary LIVE "SYMPHONIA", an appearance which included a new 3D outfit; also on day 2, he participated in the NIJISANJI Dance Live alongside the other members of VOLTACTION.