well 2 of 4 have same daddy, 1 of 4 never met daddy and 1 of 4 has ahole daddy.
MC and Sis both thought better of their dad until more recently (for Sis very, very recent). So it won't be that deep seated Daddy issue type effect like SC and Connie would have.
Yuki even has a dad who is in her life and cares he is just a bit strict and old-fashioned.
But throw in Vicky and the Twins and now we got quite a lot of dads with something fucked about them.
But hey daddy issues can be a great thing when you are a guy looking to become their man, they put up with a lot so that you don't leave / disapprove like their dad did...
Just saying