Eridians when they meet Grace for the first time
So on a desperate mission to save their planet, only one survivor returns alongside a mysterious alien. This alien *just so happened* to show up after Rocky had been waiting and all but giving up hope of a solution. This alien was so young and short lived he was pretty much born after Blip A had arrived in Tau Ceti.
This alien is blessed with being able to hear the songs of stars, and while nearly deaf and rather stupid in some aspects, inexplicably possessed the necessary skills to help solve the problem of astrophage. The alien was willing to step into the terrifying silence of the void, throw his whole ship in absolute peril, in order to retrieve the precious cargo of their salvation. And in his own time of need a humble Eridian engineer risked his own carapace to ensure the alien did not die.
But wait, it gets better! Once on a triumphant farewell, this alien TURNS BACK, abandoning an opportunity to see his home, to ensure Rocky and Erid are saved.
We don't know how religious Eridians are. But cmon, you gotta imagine them having quite the thrum about sentient life that lined up in the mother of all coincidences for Erid.