The scary thing is you look at what she just did and then you have to remember Alban and Leticia's big sister are both stronger than her. That guy with the crazy face is going to get himself thoroughly destroyed.
Pride cometh before the fall.
Raymond-sensei doesn't look very pleased. He's probably going to FAFO with Alban and Leticia. I think Olivia will be the one teaching him a lesson, though.
I love the fact that both Alban and Leticia's sister are on the the same page when it comes to Leticia and that teacher will probably be wiped of the face of the planet if he does something to Leticia.