Isabella is totally up for working with Lucy on her group (and wouldn't mind the name Hogwarts Defenders lol). There is a lot that can be done with that plot. Bella is also for hanging out with Ethan and trying to sooth his worries, if he needs a friend.
Ethan can hang out with Piper too. They did go to that once dance together as kind of a "date". We could build on that if you'd like? Camilla would talk to Ethan too if you wanted to do something with that as well.