As this is a Moment page, all spoilers are unmarked.
The opening scene is a vision Sol has of the 10th xenofauna attack during Glow Season from their POV. They hide in the Geoponics shed, but it collapses on them and breaks out into a fire. A grown-up Anemone then pulls them out of the rubble and takes them outside, but Sol sees what appears to be a dog at the exit. The dog then turns out to be a monstrous alien creature when Sol looks in another angle, and it lunges at them (and also the player) with its gaping maw.
The Faceless, both in and out of universe. Bred solely to crush the Human colony, incomprehensibly hideous (their body splits around 2/3 of the way up, disintegrating into a mess off teeth, tentacles, and eyestalks), and very difficult to kill. Seeing one coming towards the walls is always an Oh, Crap! moment for any defending humans, heaven forbid seeing more than one on the offensive. Even the one passive example of their species is still dangerous, potentially sending Sol into a permanent coma via exposure to its mind-altering spores.
The extent to which being bound to the wormhole can warp Sol is unsettling, not just because they can end up Wrongfully Committed by being too candid about their visions. This child can successfully reconfigure starship shielding at not-yet-10-years old, create viable Earth-Vertumna hybrid plants and cure an airborne illness by 12, and occasionally lapse into expository monologues about how they've seen themselves and their friends grow old together. Even when they're saving their fellow colonists' lives, it's pointed out how freaked out their impossible prescience makes the people around them.
The "Tangent's Cure" ending. Cal is killed, Instance kills herself, and everyone is forced under Lum's fascist rule for over a decade while all life on Vertumna outside of the Heliopause is wiped out by a bioweapon Tangent was forced into creating if she didn't want to see her family executed by firing squad. All of this is narrated over a picture of a unisaur's corpse, turned a rotten green by the virus.
