That was an extremely awkward and poorly directed battle scene. How can Yuu be approached and grabbed by a dying freak even when she is in Masou Shoujo mode? Why didn't she command her to, you know, run around the world 3 times naked, or just freeze forever, while she still had her eardrums?

It's not like I dislike the development. They just delivered it very badly, but I guess that is expected since this show is mostly a gag comedy.