This is a strange one, the hair accessories point towards the person with Hosaka being Makoto, but the dialogue points towards Maki. I imagine the artist used the wrong character design as reference, since the dialogue is unmistakably Maki.

Those hair accessories look kind of photochopped in. I'm seein' pixels.

You're good. The original at http://nounanka.h.fc2.com/img/min5b.jpg does look like Maki.

Why is Maki wearing Mako-chan's barette?

cuz that is mako chan. I guess the artist is trying to show how far makoto has fallen. since in the anime makoto does show signs of being interested in girl stuff.

I thought we've come to the conclusion that this is shooped