She is a 3/3 character glimmer with the Youre Grounded ability, which states that when you shift a character on top of her, you may choose one of your opponents' exerted characters, and it then wont ready for their next turn
While the artwork definitely has something to do with its popularity, its ability doesn't hurt either
Overall, I think there are quite a number of options to make your Princess deck more interesting than before and this is without considering switching Sapphire for another Ink colour
There are a couple of upgrades you can pop on Limit Break to quickly transform it from a pretty good deck to a pretty great deck
If that describes you, have a look over this guide, which will give you a quick rundown of how to play Disney Lorcana
Additional end steps don't come with any other additional steps (such as cleanup)