I really do think that to Eridians, the most alien thing about us is our obsession with space.
Space (and stars) are a much newer concept to Erid, at least relative to us. They cannot perceive stars. They can't even see their own sky.
And then here we are, utterly obsessed. The number of songs, movies, and TV shows that reference stars, the moon, our sun, it's light, astronauts, space — we can hardly go five minutes without bringing up at least one of those things. NONE of them are things Eridians have an established affinity for; to them, they're scientific concepts, and that's pretty much it.
And yet, stars are one of the first things our kids learn how to draw. We have a specific name for the connections we trace between them, and those constellations have been built into thousands of years of our history. We fought a proxy war based on who could get to them the fastest. I absolutely believe that, to Erid, this would be our defining characteristic above and beyond anything else.
It's almost cliché. How thematically on point it must be from their perspective, that an alien from a species so in love with the stars was the one to show up and save theirs.
