Oh! I think I've at least worked out the area. Is it something to do with Cid and Shera?
The stars have been stolen (The first failed mission)
The the nightmares will come (Life got bad after that for Cid and Shera)
I was powers devotion
Now Gods maid of one (Shera was a mechanic, now she just looks after Cid and the house)
Swallow the tonic (Serving tea becomes a big deal)
Hold tight not to fear
For one day they shall thank me (Cid realises Shera saved him),
And I shall travel up another year (Cid finally makes it into space)
The God stuff, and some of the clues seem to point to Cid so I'm confused, but I'll go with Shera.