And i think the blue fairy is the mother superior for this group of nuns. It made me wonder if in the fairytale world if the fairies are not allowed to get together with humans. So maybe Grumpy doesn’t know that Nova is a fairy at first.
Or maybe Nova was a fairy and then become not a fairy which is why Grumpy said she was beautiful as a fairy, It just seems weird that he would say that because she is a fairy.