We first meet her as a spoiled royalty in ANH.
Leia never seemed to be a spoilt royalty, what do you mean? She shoots stormtroopers, doesn’t break even under torture (who knows for how long), leads her rescuers into a garbage chute and is more on the point of what’s happening than her rescuers, while always thinking the best for the rebellion.
She has ungrateful attitude when she is rescued, she insults Chewie, she tries to boss around Han, she complains about the Falcon, etc.