There was chaos because he was the king and there was no heir to inherit the throne. So Merlin placed a spell on a sword and put the sword in a stone. The one that could pull the sword from the stone would become the next king.
It's a popular opinion that the more beautiful you are the more like you will get a job you applied for. Anyone would like to see a pretty face when they walk into work. Just like in school, reputation as well as beauty could mean everything, your teacher moving your grade up a few points or how they decide to discipline you. It goes the same for your job, depending who your working for.
Something like that, sorry if its not what your looking for.
Answer:
The series is Lion, Witch, and the Wardrobe. The characters names are Lucy, Susan, Peter, Edmund. Hoped this helps :)
Love, kindness, and redemption.