hmm i don't think there is a so called 'leader' .. they never mentioned at any interviews who it might be, so maybe they don't find it necesarry to make someone the leader.
But if there is, i also think it would be probably Sakito.. he is this kind of leading-person, making everything he touches perfect +gg+
If Yomi is the person in charge, than it might be the pure chaos.. and none of the female staff may come to rest, because he allways would have some special business to do for them (in a small dark chamber where nobody would hear them .. hrhr)