Jade Harley is a character from Homestuck, introduced near the beginning of the story. Her original appearance is as a human with long, black hair. She is a friend of John Egbert, Rose Lalonde, and Dave Strider. Her "chumhandle", or online username, is gardenGnostic [GG].

Around the middle of the story, she gains canine features such as ears and a tail, when she turns 'God Tier'. The reason for this is complicated, but involves her fusing with her "Sprite" version, which in its own turn was a fusion between a taxidermied version of Jade and a "Sprite" version of her dog, Becquerel. Thus, her canine features are originally Becquerel's features.

In the self-declared "dubiously canon", but official, Homestuck Epilogues, Jade is heavily implied to have a canine penis from fusing with Becquerel. She is often depicted with this in NSFW fan-art.