Kaai Yuki is the second of AH-Soft's simultaneous release of a total of three Vocaloids.  Not announced until after Miki's Christmas CD came out, she is a major departure from any other currently existing Vocaloid.  She is a 9-year old grade-schooler, who is often taught by the Vocaloid Sensei Kiyoteru.  Yuki was voiced by a group of grade school students of the same age, to create a vocal range that a normal child could not reach.

Yuki sports a traditional grade school outfit, complete with recorder and red bookbag.  Her release is so recent that her popularity has not been measured, nor has she been assigned a signature item or food.  However, due to the simultaneous release with Kiyoteru, there have been many fanarts in Kodomo no Jikan-esque style that draws the two characters in an illicit relationship.  If you are looking for fanart of this one, take this as forewarning.

Though she is the first of her age to be released to the Vocaloid family, Crypton has announced "Project If", which indicates that they may release a younger singer as well.  Stay tuned to see what will come of this one.