07-17-2017, 07:22 PM
I would say (and Shawn can confirm or refute) that you can have your NPCs and alternate characters take part in the general ruckus, but not actually enter Nebula Space, qualify for rewards like artefacts, help your 'main'/chosen character for this event, or have an effect on the actual ending. That's basically the intent of the alternate character/NPC rules.
Curious about me and the characters I play? See the 'Staff' page! See also the rosters for my characters Samus Aran or Enel if you'd like to see examples of well-formatted rosters. Hope you enjoy the Omniverse!