I watched this on YouTube a few months ago and I was amazed by how accurate the animation is to that part of the manga, it's so accurate it's as if I was watching the manga unfold as a short movie. I've also noticed that you got the color of the Behelit correct since it was stated that there are other kinds of it, one of them being green.
I remember reading it some time ago and I wasn't expecting it to be so disturbing. Rosine was a very different character compared to most of the other apostles, initially because she was a child, therefore it was already disturbing/sad from the very start. And after reading some more about her, I kind of got why she had such a memorable passing in the manga. She didn't knew what the Behelit could do, and quite frankly it wasn't really her fault. In the end, she just wanted to be happy.
Guts also looks incredible here, at that time he still had this edgy and brute personality, very far-fatched from who he is now. I kinda miss this version of him considering he was hunting down apostles all by himself, it was fun for a couple of chapters.
Overall, it's a great adaptation of Rosine's story and her fight against Guts. I'd love to see more Berserk stuff from you.