The Goddess of War is actually a soft, silly, and slow-witted girl! After someone stole her job, she slept for ten thousand years. At long last, her current replacement finally threw in the towel.
But she made a mess of things on her very first day back on the job!
Well, since a goddess who slept for ten thousand years doesn't know what a starship is, doesn't know what a laser gun is, and doesn't know the standard official language of Andromeda, she'll just have to come down to the mortal world and intern for a century or two!
This is the beautiful, carefree life of an ancient goddess in an advanced interstellar world.