Oh....hun...Haven't you read the spoilers yet? If not. You might want to now...ha...haha
Comic doesn't always follow the book completely
Ye uh that change would make the story completely different
It could be a minor difference that makes Hilda just becoming a murderer more palatable. As it stands right now, it's not. So I'll drop it. Have fun.
Spoiler...
I heard her being morally gray. And i can't blame her, she is in a situation either she kill or be killed. I actually liked this aspect of the story , it is different from "i am pure saintess FL" vibe.
Is Hilda becoming a co conspirator and murderess, I'm ready to drop. Not that I thought that Satan would become a goody two shoes but her becoming as bad as him doesn't suit me either. I suppose I wanted some non existent middle ground