So, if I wanted to flesh out the world I'd created and have fighters there who are not participants of cross-dimensional travel, could I fill out some sheets for them? In that case, would they be Secondary/Non-Critical Characters? Also, if I wanted to flesh out a general for MF's faction, would I follow the same procedure?

Is there any particular procedure for making a thread to add a universe to this game? I'd like to add Tangent as a location after I finish our T1 lesson.