Quote Originally Posted by Kraco
Maybe it was more like the others aboard think Marina is Setsuna's responsibility as he rescued her outside of the original plan. Thus he calls the shots as to what to do about her, that is, how to get rid of her.
Dude, that's fine logic and all, but it still doesn't address the fact that Setsuna's orders are suddenly absolute on the ship (until Sumeragi gets back into uniform, at least). And it doesn't make sense that Tieria doesn't even get to weigh in on things before people go about acknowledging Setsuna's orders.

How does Setsuna going out of his way by actualizing a secondary mission objective suddenly dictate what everyone else has to do? Because, if that's so, then why the hell doesn't new Lockon go, "Yo, folks, we're teaming up with Kataron because I helped them out last time!" or Allelujah go, "Don't shoot at the mobile suit with my amnesiac crush in it. Actually, let's go rescue her!" And if they did, would you expect everyone to just snap to it the way people did for Setsuna's little personal request?

He rescued Saji, and that led to zero consequences. It's clearly all about who is main character, who is main character's love interest. Trying to build logical reasoning on that is like building a house on wet sand.