@CarlsbergWe lost our...
Navigator (Tango the AI could do this but a real person is always better)
Pilot (Again Tango could do this but player is always better)
Cook
Data collector and analyzer
Assassin (though wouldn't could as needed)
As for what we need, the sky is the limit. We can have Co-position to any position as long as the original approves.
Like my character is the doctor but Tymea(Pyromania character) is a co-doctor, kind of like a nurse.