I'm thinking the same, it turns out she's being a biatch as a defense mechanism since she's probably degraded by society due to being an orphan (which I find common in manga and webtoons, is it normal in japan and korea?). Is it just me who find is concerning how people are insulted for being an orphan in a lot of stories? ┗( T﹏T )┛
I'm not sure but I think it could to be a bit accurate to the period of the setting. Modern times understand that its not right to judge someone based of off origin, but in the past it was different as orphans would have ben poor enough that for them to survive they'd steel food and stuff. So it was easy for people, expically 'nobles' and other rich people to treat them as criminals or otherwise unsavoury individuals. It's not only something found in manga, but also novels set in a medevil period regardless as to the country the book originated

It's understandable why Mamari lashed out to Carol since she was looked down simply bcuz she's an orphan....hmmm ╮( ̄▽ ̄)╭ well she said sorry so it's all good (=・ω・=) btw that gandalf like granpa is so fucking suspicious and rude,and tf he is the head of healer or sum i dont remember but he def not a good person,he is so prejudice and discriminatory behaviour of his is UNACCEPTABLE