@Lov4rr..‹𝟥 It's about the setting. Its basically a military school where power and skill are above all else by design. Waltzing in in a dress is just completely absurd. Add to that that MC's entire personality, and mannerisms, are completely different to what is expected of a knight, and even going so far as to mock the standard uniform, it makes sense that she got the opposition that she did. Its basically her own fault, but she has the power and skill to shut people up and down, so she just doesn't care about that.