Kaf is a Japanese virtual singer and voice actor who debuted in 2018, using an anime-style avatar while performing with her natural voice. She has become one of the most prominent virtual artists in Japan, known for her versatile and powerful vocals. Her first voice acting role came in 2025 when she joined the cast of the anime series Kamitsubaki City Under Construction, in which she voices the character Kafu Morisaki. The series began broadcasting in Japan on July 3, 2025, with a simulcast on Crunchyroll.

Kaf has described the transition from singing to voice acting as a very different experience, noting the importance of flexibility and responding to direction from a vocal supervisor during anime recording sessions. She found it challenging to convey emotions such as joy in a natural way at first but developed her performance by imagining how her character would think. Recording voice lines for the anime as a group, as opposed to recording music alone, was both nerve-wracking and rewarding, as it created a sense of teamwork. She has expressed enjoyment for acting and a desire to work on more anime projects if opportunities arise in the future.

In addition to her voice role, Kaf is a member of the musical unit V.W.P, alongside fellow cast members Rim, Harusaruhi, Isekaijoucho, and Koko. The group performs songs for Kamitsubaki City Under Construction, including the opening theme Utahime and the English-language ending theme Chase the Day. Kaf has also released several full-length albums and a remix album titled Fable [gamma]. She has performed at notable venues, including a sold-out show at the Nippon Budokan in Tokyo, and has collaborated with voice actor and singer Ayane Sakura on the track Sunrise.