[@Polaris North]
Alright, well at the current moment there's Phantom in regular form on the roof (I do believe), Alex and Teagan are technically free to interact with.  Comet / Dragon / Spectrum are all busy. The Chief is open. Vice is open, I do believe. Stark is pretty open.

Non-Introduced characters thus far:
Magus (Sedj is a busy man)
Stargazer
Finch (Of course)
The Fixer (I think?)

I hope that helps a bit.