ah- I realized. I think it true that she was abandoned, perhaps? I just realized the first chapter is their interpretation of rumors. because when she fainted, it was just a vague image of a woman in a witches garb
so right now i feel like the story about her being abandoned is fake
because the guild receptionist is the one that found her, Is hard to believe that he gave her to a random party
@Jezebel I think he means that he can't live her romantically. Since he accepted the role as her brother he can only love her as a brother. Surprisingly mature of him considering how most manga characters would act in his place.