Okay first off notice the use of the word 'theory' this is not truth and tu can believe what tu want of it this is just my opinion.
KuroYuri is first off in the army we have only seen one femael in the army so far out of tons we have seen, this makes it likely he is a boy.
KuroYuri got into the church to take the bishop's exams as far as i know bishops can only be boys. This further supports why tu see no female test takers and also why tu see no bishops that are female, although in the anime i did see a few ponytails but they could have been guys since i couldnt see there face's.
KuroYuri displays más of a boyish personality then a girlish one, sure he has rosado, rosa hair but really, in the anime world tu can have whatever kind of hair tu want lol.
KuroYuri is first off in the army we have only seen one femael in the army so far out of tons we have seen, this makes it likely he is a boy.
KuroYuri got into the church to take the bishop's exams as far as i know bishops can only be boys. This further supports why tu see no female test takers and also why tu see no bishops that are female, although in the anime i did see a few ponytails but they could have been guys since i couldnt see there face's.
KuroYuri displays más of a boyish personality then a girlish one, sure he has rosado, rosa hair but really, in the anime world tu can have whatever kind of hair tu want lol.