ok, to get serious, she IS a slut, somehow.
However she does it to gain attention to compensate her loneliness, so I somehow understand her...I mean, she almost jostled Houin-sensei down the stairs...
However I feel sympathy...she's still a child.
I also felt sympathy for Reiji after ep.6. But he behaves like a real psycho, he gets violent, he destroys the bond between Rin and himself and he doesn't realize anything.
Rin is a child, so she should be brought up somehow properly, i doubt that Reiji can do that, I mean, why has she even become a slut?
Reiji is the adult who should know better and be more concious.