Is len kagamine is a boy?

Len Kagamine is a 14-year-old boy voice created by the Vocaloid 2 speech synthesizer. He is the male mirror (male twin) of Rin Kagamine (female voice created by Vocaloid).

* Many people who cosplay him are girls which is why many people think he is a girl. He has a higher-pitched voice than a lot of male singers (like Justin Bieber), but once you get used to the voice and realize that he has a flat chest, you will see that he is a boy!