UPDATE!
Now that things are changing with our plot, things with the Order are going to be switched up a little bit.
Audriana's group will be consisted of people who both disagree with the Ministry, and those who believe that Wizards/Witches and Muggles will be able to live together in harmony. Obviously, the Death Eaters will despise her for it, but once Oliver decides she's mad and that she wants to change things too much, she will create her own, temporary faction. It won't last forever, because Muggles will not be involved with our plot forever.
But we still need the faction to exist, so if your characters want to change sides, or this helps them decide who to back, please let me know. I'd like to get an idea of numbers so we can start poking at this divide. Also, if you join Audriana's faction, you get to help me come up with a name ;D So shoot me suggestions if you have any!
To clarify, I still need the people on Oliver's side, as described in the first post. But for Audriana, I need someone to help her lead a new faction after we start seeing Muggle characters join and we see the Death Eaters start fighting the changes. These members will be welcomed back by Oliver, once this faction has been done away with, but Audriana probably won't be.