Hatsune Miku
Hatsune Miku was the first Vocaloid developed by Crypton Future Media after they handled the release of the Yamaha vocal Meiko and Kaito. The name of "Hatsune Miku" was conceived soon after the Vocaloid 2 announcements, when an English and Japanese vocal were developed for the character. The intended design was delayed and later used for Megurine Luka instead. Miku was intended to be the first of a series of Vocaloids called the ""Character Vocal Series"", which included Kagamine Rin/Len and Megurine Luka. Each had a particular concept and vocal direction.
Miz
After graduating from high school, she moved to Tokyo. Soon afterward, she was signed under "Universal Victor" and, under her real name, released "I WILL"(TX TV show "Renai Slot Kuru Kuru V" 's ending theme song), her first single. Five months later, she released a second single called "Ambition"(PlayStation game "Kouklo Theatro" 's theme song). Neither single charted in the top 100 singles and she was not asked to release anything else after that. Both singles are now out of print in most Japanese CD stores. Mizrock wrote the lyrics to all four of the songs on these singles.