Selim's backstory. He has arrived in the Ottoman Empire a destitute, depressed man, from an entirely different culture. Years later, he has managed to become a fabulously wealthy pasha whose family and servants adore him. Self-Made Man doesn't begin to cover it.
Blonde is a sassy, fearless, ever-optimistic girl who, despite being formally Osmin's slave, bosses him around instead, and her boyfriend won't get away with Blaming the Victim either.
Music-wise
Konstanze's role is incredibly demanding, but when sung well, her coloratura arias are gorgeous.