>>4039141People like to act like the characters are blank slates, but they have clearly taken on lives of their own. Like how almost everyone agrees that the Kagamines are siblings. Len being a perv/slut isn't quite that universal. It's often absent in specific depictions. But it is a sort of baseline assumption of his general character.
Other common features include him being the younger of the twins, being kind of dumb, and liking men. And no, I'm not making up that last one. Even otherwise moralfag western fans overwhelmingly depict him as not only gay, but specifically liking men.
