I believe it's a safe assumption to dub Nivi as a drop out for the rest of this RP (however long that may be). That said, I feel she should always be given the right the jump back in if she so wishes so killing the admiral may be a last resort if we can't figure out any other way to progress the plot. I will be posting a reply now that I can and I hope that this RP doesn't die as I've found it somewhat enjoyable up until this point.