Board Thread:General Discussion/@comment-53539-20130413201158/@comment-3076833-20140622170532

^ I suppose it's to do with the mindset that "all Vocaloids follow the same set of rules" i.e. not just the same naming scheme but also designs and style and such.

Speaking of the VYs I still ponder the entire point of giving them codenames since the idea is to draw away character from the product.