Ruyue Yan (颜如月, Yán Rúyuè) is a virtual singer for NiaoNIAO voiced by Youfei (尤菲, Yóufēi) and currently on 1.0 version. She sings in Chinese.
She can be downloaded here :
☀Her recommended range is C4-C5 and her recommended genre is emotional songs.
☀She is soft, breathy, slightly mature and relaxed-sounding, with a soothing feel.