Like, nobody would expect the MC to be killed off and be replaced by another (or for the story to straight up end here). So naturally, one would expect MC to awaken to her powers and come out on top.
This is such a common trope that I have seen this chapter's development coming a mile away. Not complaining though, since I enjoy it anyway.
Also, the commander whose plan involved sacrificing her subordinate makes her out to be a potential villain / antagonist, but I won't be surprised if the manga does a bait-and-switch. I'm betting the real villains are some adults manipulating these girls into dying for their sake Gundam-style.