Hatsune Miku
One of the Vocaloid compilations, "Exit Tunes Presents Vocalogenesis feat. Hatsune Miku", debuted at number-one on the Japanese weekly Oricon album charts dated May 31, 2010, becoming the first Vocaloid album ever to top the charts. Another album, "Supercell", by the group Supercell also features a number of songs using Vocaloids. Other albums, such as 19's Sound Factory's "First Sound Story" and Livetune's" Re:package", and "Re:Mikus" also feature Miku's voice. Other uses of Miku include the albums by Absorb and by OSTER-project. She had sung the original Nyan Cat called "Nyanyanyanyan!" by daniwell-P. Kagamine Len and Rin's songs were covered by Asami Shimoda in the album "Prism" credited to "Kagamine Rin/Len feat. Asami Shimoda". Another song original sung by Miku, "Color", was covered by Maria, and featured as the opening theme of the 2011 anime series "Freezing".
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.