While Crona is referred to as male in the anime and female in the manga, his/her/etc. gender was never truly confirmed. While Isayama says that Hanji's gender is up to the readers :3

I love them both so much <333

I love Hanji!! <3
Meh, since it's up to us, she'll always be a girl to me. Don't know why.

^ I think of her as female too but I'm open to her being any gender ^ ^

^ I think of her as a girl, and my friend thinks of her as a guy, but as long as we know who the other is talking about it doesn't matter how we refer to her.

In anime Hanji is a girl and Crona is a girl too. But they are both good characters. :)

I like both of them, but Hanji was one of the best parts of Attack on Titan to me~

I love them both! I view Hanji as either nonbinary or a trans girl, and Crona i think of as genderfluid

I will always think of Hanji as female myself but that's beyond the point.

I love them both. <3

Is Hanji's gender really questionable?
Still both are awesome.

^ Yes, the creator specifically said that they are not canonly female or male.

My beautiful precious child. <333