Tortoiseshell was a NightWing-BeetleWing hybrid of unknown gender who was mentioned in The Lost Continent. They were one of Sunstreak's and Clearsight's dragonets, along with Jewel, Commodore, and Orange.
Clearsight described Tortoiseshell as whip-smart.
The Lost Continent Prophecy
Clearsight saw Tortoiseshell and their siblings in a vision after arriving at Pantala and saving the dragon tribes.
= Possible timeline