I think her cheeks are red because she pinched herself to activate the clone. In the second panel.
It was a genius plan in theory, not so much in practice.
Don't run <330 minutes later...(Real body)I can only use this now!!You'll just have to guess...Gods! Why won't this little monster get tired?Mirror Image!I like the red-faced one more~I've got no other choice!Which one is the real body...?(Split body)