Len Kagamine is a virtual singer known more as Vocaloid, he is the mirror part of Rin Kagamine, considered his "twin sister". Like Rin, he has blonde hair and innocent blue eyes. Len has a tiny pony-tail standing on the back of his head and also has a white head set. Unlike his "twin sister", he is more childish but just as insulting. He is rather energetic and has mostly been seen with either Rin or Kaito. He is often portrayed as perverted, snobby and annoying, but can also be very sweet.