So, we're pretty sure we're plural and we think we've figured out how our system works. I won't go into details, but I will say it only really works with only one "permanent" headmate and any number of transient headmates. This is problematic as one of my previous permanents (Jade) is trying to return, but my current permanent (Miles) is showing no signs of leaving. We may need to spend some time sorting this mess of a system out.
And, of course, I put quotes around permanent as, clearly, they aren't, well, permanent. But they're the headmates that stick around in my day to day life, rather than coming and going within a few days.