Mayu is, what, 12? 13? And Bandou seems to be in his late 20s to early 30s... Haha, fucking hell this story is wild.
Okamoto was definitely exploring his weird older man-young girl master-servant relationship fetish while writing Elfen Lied. I mean, c'mon — there's so many girls in this story that have some form of daddy issues lol. Nana, Mayu, Mariko, Nozomi... And I still have no idea how that bum Kurama is still alive.