Return to Fort Joy camp and hand over the orange, when asked advise that Stingtail is the thief. If Sebille is in the party, she will want to speak to him first and kill him after her conversation with him the orange can simply be taken from him body afterwards.
Upon reaching the camp, speak to Stingtail and convince him to return the stolen goods. Agree to retrieve Griff's stolen fruit and head south to Stingtail's camp. Upon attempting to speak to him Griff will call out to advise the Sourcerer to leave him alone and will explain that he is a thief that stole his oranges. In a cage at the south of Fort Joy camp is a sick elf, named Amyro. Speak to Amyro and follow him to the caverns.Optional: kill the assassin Silence and speak to Stingtail.Retrieve the stolen goods from Stingtail and bring them to Griff.Speak to Amyro (the caged elf) in the camp kitchen.Optional: Speak to Saheila in the caverns.The Imprisoned Elf is a side quest in Divinity: Original Sin II.
