Review Detail of Green_riding_hood in The Villain’s Bodyguard

It has a good start showing how ruthless the new world is. I was really into it and when the ml arrived i got hooked for sure. The novel does somewhat fall flat once the mc meets the teacher. He's supposed to be this all powerful type of character but due to a plot point he's getting scared of our mc? It would be reasonable for him to get scared if the mc had a way to pay him back afterwards or imagining all sorts of torture but instead she just wings it. The past life comes into mention whenever our mc starts doing something smart or interesting but that all stops in front of the teacher.