You teach her what the word manipulate means.
You teach her and tell her, it is not nice.
You teach her, not to be a doormat.
You teach her, that "friends" are NOT always nice. Because, they are not friends.
You teach her what a friend is and is not.
You teach her, that some people are just not nice.
You teach her, to CHOOSE her own, friends.
You teach her how to speak up.
You teach her, to KNOW HERSELF, and to know, who SHE is.
When a child knows who they are, they are less prone to be manipulated.
You teach her, that being a "people pleaser" is and can be, dysfunctional. You would not want her to be co-dependent right? Teach her to stand up for herself.
Teach her, that people like this, is just another form of bullying.
Teach her, to know boundaries and to say so.
Teach her, to choose.... friends.
*TEACH her, that she cannot "fix" everyone.
*TEACH her Self-Respect. And to know herself. One day, she will have a boyfriend, would you want her to act this way with a Boyfriend that is mean to her, like that girl Maddy?
Think, ahead, as well.
Teach her these things now. It is not just with other girls.
Don't make excuses for Maddy. Tell your daughter, it is WRONG.
Ever since my kids were toddlers, I just have always talked to them, in everyday situations, about people. Their motives and how they are, good or bad. I am very blunt. But I explain things in age appropriate ways so that they can, understand. I did that, so that, once they were in elementary school, they would be aware enough, about it all. Mean kids, nice kids, how to choose friends and speak up, to KNOW right and wrong, to know what manipulation is and how to recognize it etc. I just chat to my kids about it. Nothing formal. Just chatting. And giving examples etc. And as my kids grow up, I make sure that they are not just too focused on "pleasing" others especially if someone is being mean etc. They NEED TO KNOW THEMSELVES, and be self-assured.
And to recognize, when someone is trying to make them do things, they are not wanting to. And if a kid doesn't want to play with you, fine. THEY are their own, person. Just go find another friend. Don't take it personally.
There is a girl in my daughter's grade level... that is such a doormat. ALL the other "alpha" girls and mean girls, just boss her around, and she just TRIES to please them all the time. She lets... them do this. And even my daughter will say, that she is just a puppet. She doesn't have her own mind. She doesn't realize, that those girls don't even care about her, they just use her and everyday they have a different mood. My daughter steers clear of kids like that. She has learned how to "recognize" it. And types of people.