Trivia: The ship that Cassian steals in the first episode is a prototype of the TIE Avenger. This was introduced to the Star Wars canon first in the 1994 PC game, Star Wars: TIE Fighter. It is portrayed as the next evolution of the TIE Fighter as an elite experimental ship and predecessor to the TIE Defender. It has enhanced shields, a hyperdrive, and heavy weapon loadouts including proton torpedoes. Andor season 2 is the first time this has appeared in Star Wars live action.






Answer: I agree that the aliens' motivation is not clear, and this may all be a writer's shortcut to get Andor and Melshi on to the next part of the story. But I believe they are very disgruntled with the Empire, and I suspect they may be pretending to be more hostile than they really are, just to wind Andor and Melshi up. So - with no other evidence - I think they give up their ship because it messes with the Empire, it helps some mistreated prisoners escape, and the aliens have nothing better to do than walk back to their homes.