Thirst Level: 9.89

Kelly Chambers' thirst is one of the most drastic parts of this list. It starts off romantic: a few flirtatious conversations here, some shared fish-feeding responsibilities there. Chambers and Commander Shepard inevitably share a special moment in the Captain's Cabin, but depending on a certain decision you make in Mass Effect 3, Chambers may end up killing herself. The power of the thirst is real, y'all.