This is just a general curiosity question. I currently have a sorority with nine girls, and all of them have been getting along splendidly since I first introduced them-- I've had barely any fighting and the worst it's amounted to is the occasional fin-nip. The tank seems to have TWO alphas currently, with one being slightly more dominant than the other, but they don't fight and all the girls seem to respect them equally.
However, out of the nine, I've noticed there's one girl who seems to be the 'omega'. At feeding time, everyone come happily to the surface to eat, and out of the entire group she's the only one who hangs back-- I have to distract everyone else and then slip some food into the back of the tank for her before anyone else notices. She's extremely shy and seems to be the most beat-up of the group. (Although, to clarify, that still only amounts to minor fin damage-- she's still perfectly healthy.)
I'm debating removing her just so she can have a nice, comfortable home away from the bullies. However, I don't know whether that would disrupt the tank's hierarchy-- they all get along remarkably well for a sorority, but if I removed her, would they simply start beating up on someone else?