Starlight Glimmer if she were real would be German and her favorite subject would be philosophy.
She’d be the kind of German who would be into those angsty type of philosophers like Goethe (especially a particular novel about a guy who fell in love with an unattainable woman.) or Nietzsche.
Her favorite type of art is romanticist art especially the one with a man on a mountain looking at the great beyond.
Also for Starlight’s magic, it would focus mostly on emotion especially anxiety or rage. And a lot of it has to do with emotional release and control.