What theme to tackle in Pan's Labyrinth?

I have to write a paper, and I know there's bigger themes involved, but would you take a more tedious theme is following orders?

It took place in Fascist Spain and Captain Vidal made all his choices off someone of higher authority, Franco. Where Ofelia took her orders or 'tasks' from the Faun.

Captain Vidal took executed his orders, but killed innocent people along the way.

Where Ofelia did what she was told no questions asked, but when it came down to hurting someone innocent, her baby brother, she took it upon herself to defy her authoritative figure and NOT take the life of someone innocent. Unlike Captain Vidal did. (Killing the man hunting rabbits, and the doctor)

So I'm comparing and contrasting Ofelia and Captain Vidal.

He wanted to 'clean spain' but ironically, he was dirtying it with his hands full of blood.

IS this is a good place to start? If you have any suggestion, by all means please do!