I wouldn't have noticed that it was Aqua before Kana said that she liked Pieyon better haha. Is there a voice mod in that mask or something ??

Kana really is putting too much pressure on herself, but Ruby's pureness saved the day. If kana repeats the story that Ruby told her. Ruby and Aqua could finally discover who they each were, they will probably tease us many more times before that actually happens though.

And now that I think about it, it's kind of weird that Ruby has never thought to go back to the hospital to meet doctor.