Oh, alright. That clears things up quite a bit. If the Kreia confrontation can't be done without one of them standing around, then having them leave during the assault on Telos would be for the best, assuming that the character's sequences/cutscenes play out, like Disciple contacting the Republic and Handmaiden returning to the academy. If those play out, then it gives both characters a plausible reason to stay behind rather than simply dissapearing into the aether like Bao-Dur does.