If you’re not paying attention to the whole ‘alternate universe version’ thing, Sunset and Twilight’s character development over the course of the movies is very interesting.
Twilight: Hero in the first movie. Constantly frustrated and under pressure for expected success in the second movie. Villain in the third movie.
Sunset: Villain in the first movie. Constantly frustrated and under pressure for expected failure in the second movie. Hero in the third movie.
Sunset’s mind: On one hand, I have a newbie from my world just getting used to her body and all its urges. On the other, I have her sexually repressed human counterpart in a schoolgirl uniform. Jackpot!