Windstone is Windy's pet vampire bat. She has black-gray fur with green ears and wings and luminous blue eyes.
Windstone and Laelaps are shown to have been together since they were rescued. Like her canine friend, Windstone is very loyal and friendly to only her teammates.
It appears she has the ability to see through disguises and transformations.
Windstone is also shown to summon small twisters.
Trivia:
Windstone is named after her green wings and powers similar to the windstone crystal.