Not to be a total contrarian, but unless I’m missing some context for the line, “Her” would sound a heck of a lot more natural to me here than “she” would. Given the statement could be rephrased as like “Her commanding us?!” or “For her to command us?!”… you couldn’t really replace “her” with “she” in either of those rewordings, and it doesn’t especially make sense to do so with the line as it’s phrased in-game, either.