Blitzo is kind of a pain to draw because his design can be so inconsistent. Sometimes he's normal stance is slouching, somethings his horns curl differently, sometimes his head is longer... it was a struggle to find a good view of the back of his head.
Here, we get a decent look into Millie's mind and why she was so frustrated with Loona earlier. She really wanted their relationship to improve in some sort of way, and from her point of view, it looked like Loona went right back to bullying Moxxie. She was starting to regret being so intimate and open with her.
But I think she's getting a better idea of how Loona shows how she cares.