Coming from a complete outside perspective this seems like a classic case of "I have too much shit on my shelf" regarding Emerald. You can only handle so much responsibility when you have such a general role of "Staff Manager" that does so much shit. The behaviour of Emerald directly interfering with the round by spawning in stuff for herself violates the nature of staff not interfering and letting the round play itself out pretty badly. Instead of severing off one side of either "clique" by "finishing someone off", perhaps it would be better to mediate it out.
Despite all of her competent coworkers trying to give her valid advice that perhaps spawning in items, killing a marine, and interfering with the round is wrong and STILL ignoring it is arrogant leadership.
If you say one thing and the other dozen people on your team go against it, perhaps you should clear your mind and listen to them. After all, they are doing nothing but trying to help and they are your trustworthy team members so they deserve your attention towards their opinions.
It would be in my opinion that Emerald is showing this behaviour because she is finally cracking from all of the responsibility "All of this drama is causing me physical problems in my life" and the pressure that comes from it. Emerald was basically thrown into her current role after staff shifted, but even then stress is not a valid excuse for her actions. She should be able to see herself that she either needs help handling issues, or is not fit for the job and do something about it. Now I am only aware that there are staff meetings but I have no idea what goes on in them, but if it isn't already happening I would be bringing such issues to the table during these meetings and hearing the opinions from everyone as to how to handle it. And if the two people from the cliques mentioned are in that meeting, pull them aside first and genuinely talk to them, mediate, and come to a compromise like adults. If the two parties can't come to a compromise so they can act like members of the same team then work on alternatives. I won't go into detail but that is the job of a MANAGER, to MANAGE your team members and keep them on track. Not to burn and "out" another member just because it would be easier. Everyone can be like sweet little angels when they come in as a trial member of the staff team, but of course drama is going to pile up, and it's up to a manager to keep things running smoothly. We're all human here.
So all I'm saying is play devil's advocate a little, put yourselves into Emerald's shoes to see how we got here, but let's not also ignore what could be done better here. Apologies if I am getting anything wrong, I am a complete outsider that is relying on the fact that the information Zane posted here is 100% true and unbiased.