Is it just me, or are all the houses very unbalanced gender-wise?  I think all the members of Machina are girls, only one member of Bestia is a girl, and only one member of Phantasma is a guy.  Dracona is a bit better, but that's only because there are only 3 members so far (2 guys and one girl).  Not that there's necessarily anything wrong with it, but it does seem kind of odd.