Lenka, Rinto and Io are the canon genderbends(Len, Rin, Ia)

Lenka and Rinto sang a quartet with Rin and Len, Love Dreamer.

Io, the genderbend of Ia, making a single appearance in Six Trillion Years and Overnight Story.

A/N-I decided to add questions in here: Who's your favorite Vocaloid that gets little to no attention?Ex. Piko,(He's one of my favourite Vocaloids overall.)Kaai Yuuki, etc. Also, who's your favorite genderbend? Ex. Io, Lenka(My personal favourite), Rinto,etc.