Damn, that's brutal to cut off her arms like that.. I mean yeah maybe she deserved a beating, but she wasn't a totally worthless human being.. She even warned about the masked attacker to her secret crush (mc's nemesis/team mate/prince)..
I actually hope they can fix/re-attach her arms in this story some way, and that she would become a good person step by step.. She would be much more interesting and a better character that way.
I've always disliked these protagonists who cut away peoples arms away like that without a moment of a regret...-
(yeah, that actually is a recurring trope in these ancient/wuxia stories, and many times their crime isn't even so terrible for them to deserve it.. just like in this case (or at least you could make the argument on behalf of it))
-Because more merciful way would be to just cut off their head instead, since you can't live in a world like that without your arms... Or at least you can't call it a living.
Also, damn, all these people are fucking psychos.. No sympathy or worries from the adults/instructors, or from the other students regarding the girls health, basically no one batting an eye for that...
It's like I'm watching reptilians in human skins, acting "human-like", but totally lacking that essential part of humanity/compassion/solidarity, and care for others well being..
(or maybe the author is just a total psycho)