Meiko - Yenra Picture Wiki
Meiko from Vocaloid
Meiko is a humanoid persona voice by a singing synthesizer application developed by Yamaha Corporation using their new Vocaloid singing synthesizer technology and was originally codenamed "Hanako". Her voice is sampled by Meiko Haigō. She has performed at live concerts onstage as an animated projection. Many songs have been created with her.
The name of the character comes directly from her voice provider's name, "Haigō Meiko". Meiko's codename was "Hanako"; it likely came from "Yamada Hanako", a placeholder name for female characters, and the Japanese equivalent to "Jane Smith". "Megumi" was also a name considered during her development.