* AlternateCharacterInterpretation: Loads and loads to go with the LoadsAndLoadsOfCharacters. Given how many different points-of-view are presented and many with [[UnreliableNarrator unreliable narration]], this is one of the pleasures of reading it.
* HeartwarmingMoment: After Sax is captured by the metanats in ''Green Mars'' and the underground--Maya, Nadia, Nirgal, etc--discuss the difficulties of rescuing him and the fact that information on their whereabouts will certainly be [[MindRape forcibly extracted from his brain]], one of them concludes the discussion with "Besides, it's our Sax."
* MoralEventHorizon: Phyllis, when she [[spoiler:sides with the metanats and helps them hunt down her fellow First Hundred. She has Arkady Bogdanov and the entire city he's based in ''immolated'' by raising oxygen levels to an extreme and igniting it]]. It's actually debatable that that was her idea: she clearly knew it was going to happen, but may not have had the power to prevent it. It goes without saying, YMMV. The question of whether Phyllis is a monster or is merely a fool who made a deal with figurative devils is something of an in-universe YMMV for the First Hundred (one among many).
* TooCoolToLive: John Boone and [[spoiler:Arkady Bogdanov]].