Hatsune Miku
Since the success of her Vocaloid 2 package led to an expansion of marketing possibilities, most of the mass marketing has come after her initial release as a response to her popularity and has been on going since 2008. Even with the addition of other Character Vocals, Miku's name continues to be used as the primary source of marketing for Crypton Future Media, to the point where most products for their Vocaloid related products will usually only feature Hatsune Miku's name. In March 2012, the Nomura Research Institute estimated that the sales of all Hatsune Miku brand goods added up into the region of since her release in 2007. Her name is easily the most recognizable of all Vocaloids.
Crypton Future Media
Due to the success of placing a character on the box art of Meiko, the concept was carried over to her successor Kaito and later Vocaloids to encourage creativity, however neither Vocaloid's box art originally had the intention to represent that Vocaloid. Though Meiko experienced good sales, Kaito was the only one who initially failed commercially, causing less demand for male voices for a while after Kaito's initial release. However, sales eventually picked up and Kaito later won the Nico Nico Douga second best seller award of 2008. Meiko and Kaito are reported to be in discussion for an update. Several updated vocal expressions have already been recorded for Kaito.
In April 2011, it was confirmed six vocal expressions had been recorded for Kaito, two of which were dropped and the remaining four were being brought forward with one having reached alpha stage already. The Character Vocal (Hatsune Miku, Kagamine Rin/Len and Megurine Luka) series Appends had been created from vocal performances of their voice providers, however the new Kaito Appends were created by adding echo, force and tension to the samples.