who do you think would argue?

Same with the others!

Katie H and A.N Other.

Well Katie H's natural personality stance is argumentative so it would definitely be her on one side. The other/s depends on who she and the group perceive as the weakest.

The weakest would get bullied and that is patsy ... Which would be very difficult viewing as she wouldn't be able to cope

Keith would probably start getting it.
They were warming up with that before the main rivalries took over, with the 'Keith always leaves the room when there's arguments' and Katie H seems to have an issue with the way he handles drama.

If those three weren't there it would be a shame, because they're the only nice ones.

Katie h would she would find someone to pick on