What I mean is, per Ichika's logic, he will first treat them like nuisance that's very desperate to stay with the Orimuras for
no clear reason.
And he will use his logic IF his friends pestered him about beautiful people camping in his household, he will either said "Friends of my sister" who automatically become his "sister figure by proxy", and thus the easy answer would be "his sisters".
And of course, he'll ask them to behave as proper... to no avail
