After getting guardianship of my Mom, can I have a court order someone not to speak to my Mother?

It's about their eviction from her home? When I get guardianship, I am removing my great-niece from my mom's home. She has been there a while - is not on her lease and is a completely disruptive, drug using, desrespectful 23 year old. she manipulates my mom who has dementia and my mom is obsessed with her as if the greatgrandchild is still a teenager. I am planning on starting a holdover proceeding to get this kid out of my mom's house. My concern is that she is in my mom's ear all the time, trying to get her to defend her and it upsets my mother and causes my mother to get asthma and emotional outbursts in her defense. I am wondering if it is ever possible to stop someone from speaking to an ailling parent. particularly something that brings conflict, upsets mom, etc. You can't remove someone from the home immediately, and it takes time, so i am concerned she will get in my moms ear when she is served and would like to have an order against it.
thanks