I will first state who I chose for her, then I'll talk about Lady Gisela. I chose Emma Watson, I know this is a very popular opinion among the fans so yippee!

I know this is acting but I really couldn't even imagine Emma being as cruel as Lady Gisela but like she does look like her.
Plus once you see who I have casted as Lord Cassius you'll be even more persuaded.

Another person who I REFUSE to add to the official fancast is Taylor Swift. She looks like Lady Gisela but I really don't support her as a person.