She's a princess, because she bedazzled it with hot glue and rhinestones on her pink corset top. All the knights at the fair shower her with compliments and finely crafted leather bags, but the only one she adores is her puppy. He travels with her on a silk pillow everywhere she goes. Even though she has it all, she still wants more.
Each mastery level adds another card to the cardpool for defeating Gwen. Each of the bronze, silver, and gold mastery levels unlocks a new card, while it takes all three diamond and onyx levels to unlock a single card.