Crystalina is a Sky Dancer from the toy line.
In the book Crystalina's New Pet Puppy, Crystalina finds a stray dog named Wing. Wing clashed with her other pet, a cat named Spin. Spin was envious of all the time Crystalina spent with Wing. Crystalina's parents wouldn't let her keep both pets if they didn't get along, but Crystalina realized she wasn't paying enough attention to Spin. As they started getting along with each other, Crystalina's parents let her keep Wing. Crystalina also appeared in Gem Starr's Easter Egg Hunt, Glitter's Day at the Sky Carnival, and Sunbeam's Spring Picnic.