Why isn't #3 smiling?

Nobue doesnt smile (properly), and I think the point is that she's going through everyone else's hairstyle.

#2 isn't anyone else's hairstyle though. (although it is my personal favorite).

someone had it in the issue 0 I think

that or it's post shower Ana

I love all her hairstyles.

OR

its a run on about the watashi_no_oniichan characters

which makes a lot more sense.