Teto Kasane

Kasane Teto (重音テト) is a Japanese vocal developed and distributed by AH-Software Co. Ltd., in collaboration with TWINDRILL, and was released as an AI voice database for Synthesizer V Studio in April 2023. She was originally released for the UTAU engine in April 2008. Her database received an update for Synthesizer V Studio 2 in November 2025.