Based on the first chapter and her being on the first volume cover, I thought Nomamoto was the protagonist or, based on the chapters following that, that her and Kitami were going to be dual protagonists. But for quite a while now, at least since the aftermath of Huntaway's death, if not before that, Kitami seems to be the sole protagonist. Unless this is all just a single arc focusing on Kitami, Nomamoto doesn't even seem like a deuteragonist, more like a sidekick or mascot. I wonder if the mangaka changed course after chapter 1 because he realized she wouldn't be a great protagonist (neither is Kitami, though - or anyone in this manga) or if the first chapter was just a red herring - an introduction from her point of view.