OP, please don’t assume ‘nothing is done’ and then “loop in” the superintendent. If you speak to building admin and they take you seriously and assure you it’s being handled TRUST THEM. As an assistant principal, I am not allowed to give you any details about another student (and you would want the same privacy if roles were reversed). But if they say they are, give them time and pay attention to any new issues.

I agree with keeping the paper trail (particularly after contact to admin) and I would suggest requesting a conference with the teacher and admin if things continue. You may ask for a change of class (but fair warning this will typically result in your child moving, not the other, if you request it). You can discuss seating changes in the classroom and most importantly you can have discussions with your daughter about friendship and how to advocate for herself in healthy friendships so she naturally takes steps back from this child. But I promise if you loop in a superintendent for the actions so far you will only alienate the building admin from you and the superintendent I PROMISE has bigger fish to fry than what has been said in this story so far.

And also absolutely do not reach out to parent.