  :::Hi  here. I have read up to chapter 40 of the manga and discovered that the Director and his son are both from a long line of Diclonius whose potency has been watered down over generations by interbreeding with humans. The director's son explains this before he is beheaded by Lucy (this is omitted in the anime). The manga seems to explain everything but we'll need some japanese-speaking person to explain it all to us as only 40 chapters have been scanlated into english. - 