The Kagamines are supposed twins and or lovers. Their basic page info did not include if they were twins or lovers, however the key concept was that Len and Rin are one soul in two bodies. Their character items are two roadrollers; Rin's roller is the color yellow, while Len's roller is the color orange. Two songs that are noticible they sing, besides Alice of Human Sacrifice, are the songs Akuno Musume (Daughter of Evil) and Akuno Meshitukai (Servant of Evil) of the Evilous saga created by Mothy.