Len Kagamine was developed in Japan by Yamaha. This software became a hit in Japan right after the release by Crypton future media. Len Kagamine is a part of Rin & Len, which means mirror and sound and has also performed concerts as animated holograms. Initially, the concept was to present them as twins, but somehow that did not work. For now, Len is neither a sibling nor a lover of Rin. They are just two voices, and you can get these Len Kagamine themed wallpapers right here.