How would you personally go about making music or ambient sound for this type of theme?
First off probably (maybe) you would have to chose a scale. I wonder what the best one would be? Is there a "best one"? Is it even important
Tempo would be on the slow side.
Then what type of sounds? Both from the synth side of things and actual instruments.
I think reversed sounding synth pads would be good. They seem to me to conjure sunrises or sunsets.
Woodwind instruments almost certainly for that fluttery sound.
Breathy airy pads, maybe choirs? Bell pads? Chirp sounds? Wooden percussion?
You could add field recordings but that is cheating a bit.
What techniques would you deploy if you had to paint this picture with sound?