Narcissistic pervert

I am interested to hear what the school‘s position is when dealing with a narcissistic pervert. Indeed, from what we learn, what the narcissistic pervert says or does goes into the C line and then we have a thought about it that leads to a feeling, actions and then result.
Is it as simple as this? When doing reading on this topic, the strategy of those types of people make it difficult for their victim to react , leave, etc.

I am interested by this subject as I had to deal with someone like that at work this year and my sister is in this situation with her husband.
The concept of emotional childhood in this case does not seem fair as it seems that it is the ‘victim’ that is not an emotional adult.
I am interested to hear your view on this. Thanks in advance.