KAITO is a Vocaloid DTM (Desktop Music) software created by Crypton Future Media. He utilizes the older Vocaloid engine, the predecessor for Vocaloid2, and his voice is completely computer synthesized thus is less smooth sounding. The voice was supplied by Naoto Fuga. Although rougher sounding, Kaito and Meiko are able to incorporate much broader voice range than Miku and Rin/Len. He is fit to sing anything from hymns and children's songs to R & B and pop, though the style that he is best used for is singing pop ballads.
As a mascot character, being the younger sibling of Meiko, he is also the older brother figure for the entire Vocaloid group, frequently called "nii-san". KAITO is often the brunt of abuse from the 'family', often getting rolled over by the twins' road-roller (roda-rolla). He wears a white coat and a blue muffler. His character item is ice cream, which he is very fond of. In particular, he loves the Häagen Dazs brand. He's also noted to be in some songs and many fanon as Miku's lover.
Notable KAITO songs
卑怯戦隊うろたんだー / Hikyō Sentai Urotandar by シンP (Shin-P)
This song is also sung by Miku Hatsune and MEIKO.