Pearl

Pearl is a juvenile Brachiosaurus that appears in The Evolution of Claire

The Evolution of Claire
Pearl is first mentioned by Bertie when she, Claire Dearing, and Tanya are driving to Gyrosphere Valley. She is mentioned to play with unoccupied Gyrospheres, causing a lot of trouble for the park.

Pearl is later seen when Claire and Justin get their Gyrosphere stuck and are forced to get out. Pearl then appears and begins playing with the Gyrosphere, accidentally endangering the two humans, both of which eventually make it to safety.

Fixing the problems from Pearl's play habits make up a large part of the book, and it is eventually decided to give her some play Gyrospheres, one colored with orange hexagons and the other with polka dots. This works and Pearl stops playing with the normal Gyrospheres.

At the end of the book when Claire is wondering if she lost the wonder from these creatures, Pearl reappears playing with one of her Gyrospheres, before noticing Claire and moving over and greeting her, assuring Claire that she hasn't lost that sense of awe around dinosaurs.