I know Reanna calls me and the other people a subsystem, but I never saw it that way. We're more like roommates living in the same house. We just happen to share a form.
I asked Reanna to retcon me and the other people as being a non-disordered protogenic system. Pre-phalanx, we were disordered in-headspace according to our backstory. This made us wary of interacting.
Now, with that gone, the other people and I are free to interact!