I somewhat get the impression of long lost siblings. From the characters subtle interaction.
Almost a mythological tale of an older brother exiled to earth as a mere mortal.
Finally reunited with the one devine soul, his sister, who he swore to protect. He now realizes that all those years of worry and blame were all for naught.
For she was still among the gods and HIS protector all along..

That's a beautiful drawing by the way. I'll get to work on that idea as well...