Ao Hibiki is a Japanese virtual YouTuber and voice actress known for her work in the Watanuki-san Chi no series of live-action/VTuber hybrid dramas. It is important to note that there are two distinct public figures who share this name. One is a traditional, non-virtual voice actor affiliated with ACROSS ENTERTAINMENT, born on October 24th from Shimane Prefecture. However, the individual who portrays Mitsuki Watanuki is the virtual YouTuber (VTuber) Ao Hibiki.

As a VTuber, Ao Hibiki debuted on February 14, 2018, quickly gaining attention for her energetic personality and creative video content. Her career expanded significantly when she was signed by the entertainment company Avex in August 2018, becoming both an idol and a songwriter under their label. This move marked a significant step in her career, bridging the gap between virtual online content creation and mainstream Japanese entertainment.

Her most prominent acting role is as the youngest sister, Mitsuki Watanuki, in the TV Tokyo drama Watanuki-san Chi no, which aired in 2019, and its 2020 sequel, Watanuki-san Chi to. These series were notable for being experimental dramas featuring VTubers in live-action environments. For this role, she performed alongside other notable VTubers such as Tokino Sora and Sarugakuchou Futaba. Ao Hibiki also contributed to the series' music, performing as part of the unit The April Fools with her co-stars on the theme songs for the second season.

Beyond acting, a significant part of Ao Hibiki's career is her work as a musician. She has written and composed numerous original songs, demonstrating a high level of creative control over her musical output. Her discography includes singles like Hirahuri Fuwari and ChuChuChu♡Darling, as well as collaboration tracks with other artists. Her talents have also led to voice acting roles in video games, such as portraying a fictionalized version of herself in the 2020 game VVVtune.