i think we gonna experience another type of headache in this arc.
you all remember this dialouge " place to return" from the 3 tailed arc.
we gonna see another dialogue in this arc which is
" horatu: i want to be your student, i want to call you master.
ukataka: don't call me master!"
the...
they have never mentioned any thing about sakura's family..even her parent's are unknown guys or not important guys.
so how there is blue haired sister