Why don't the Vocaloids have very much canon (or official) information? Well, here's the answer! Most of the Vocaloids don't have very much official information because the companies don't want to limit the consumer's creative potential. This is shown with Vocaloids like Rin and Len Kagamine, who look like twins but have not been officially declared to be twins. This is also why most of the Vocaloids don't have canon personalities, so the consumer doesn't have to think about if a Vocaloid would sing something based on that Vocaloid's personality. However, the Vocaloids do have some official features, like their items (Hatsune Miku's negi or leek, Kaito's ice cream, Megurine Luka's tuna, etc.), and some of them also have official ages, weights, and heights as well.