Kasane Teto is a character in Vocaloid High: A New Year A New Singer. She is Yumi's best friend along with Momo Momone and is a rival of Hatsune Miku.
Teto is a funny, kind, tomboyish friend of Yumi's. She acts like Ayumi Sakazaki sometimes. She and Momo has been friends, which is a reason why they wanted to throw Yumi out of the window when she refuses to heal Kiyoteru.