Kaiko

Kaiko is a genderswap fan Vocaloid based on Vocaloid Kaito. Her name is a combination of "Kaito" and "ko", wherein "ko" pertains to a "child" or "girl", in Japanese. Her voice is often created by raising Kaito's voice by a pitch or two, although sometimes another female Vocaloid's voice is used instead, such as Gumi's.