The mirror twin of Rin Kagamine. He never leaves her side...ever.
Len is not quite such a child and innocent as his cute "little sister". He is stronger in spirit and therefore very protective of Rin because of her innocence and naivete. You will almost always see the two holding hands when they are anywhere just because she has a reliance on him and he enjoys her company as it makes him never feel lonely. It is sometimes wondered by people if Len and Rin are more than just mirrors...more like a couple. There is no proven fact or fiction to this, but some of their duets have a more romantic feel than just mirror twins. So, it is entirely possible this is true.
He carries around nothing more than a wallet and sometimes a few scraps of paper and a pen so he can write songs whenever he has the inspiration. You might say his sister is a piece of his equipment as he always has her with him.
Read introduction or read throughout the roleplay.