I understand bc her backstory. But the backstory has no relevance except for the fact that it was created solely to be the reason for her being so naive. Because she's naive, she doesn't question things such as the high priest that conveniently sent the Saint after the knights already died. She supposedly is familiar with the story, but it's useless since it does not aid her in thinking logically.
Ml gets on my nerves tbh. I wish mc could find someone better in the future