Haiyi

Haiyi (海伊) is a Mandarin Chinese vocal developed and distributed by Beijing Photek S&T Development Co., Ltd., and was released in September 2019 for the first Synthesizer V engine. She is part of the MEDIUM⁵ cast.

Haiyi was later updated to Synthesizer V Studio as a Standard voice database in July 2020. She was expected to receive a private Standard-trained AI voice database known as "Haiyi Synthesizer V Plus", but no development information was provided. Instead, she received a full AI voice database in January 2025.

Songs in the channel using Haiyi

Better Things (feat. GUMI ✦ ROSE ✦ POPY ✦ Haiyi)

By aespa

Snake (뱀) (feat. POPY ✦ Miyamai Moca ✦ Tsurumaki Maki ✦ Hibiki Koto ✦ Haiyi ✦ Ritchy ✦ Yi Xi)

By Medusa (Girls Planet 999)

My Favorite Vocaloid Song Medley (feat. 65 VOICENANKS)

By M.I.

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