It seems like Nakatani is the same person as the one who's thumbnail is on chapters 70-72. She looks softer...something must have happened. Something to do with Tsubaki maybe but I'm glad she had a change of heart this chapter.
I noticed that, but I dismissed it because it looked like the Homura one had shoulder-length hair. That's probably what it's supposed to be, but for legal reasons it is not.