Harlequin Treestrider.

Koryn had ridden treestriders before, but they had been the small ones that he and his friends played with when they were very young. He had always dreamed that one day, he would have a full-grown treestrider to call his own. That day finally came, when Koryn passed the rites of the Fenerogh, and was rewarded with not just a Greater treestrider, but the rare Harlequin Strider, the fastest, most agile of all the striders.

It was the happiest day he had ever known, and Koryn and his pet strider NimbleSky would go on to explore the great forests and have many wonderful adventures together.