I think in addition to doing what you are doing, you need to remind mom and dad that she has to learn these very important social skills.
Much of it does sound like"typical" toddler behavior, but that it is going unchecked at home. Princess needs ro learn that she is important and special, but she is not rhe center of the universe.
What are the consequences when she rips a toy out of someone's hand? She is old enough to know rhat is not ok. I think one warning, and then start to either take away priveleges, or whatever you normally do.