you were a siren that came to the surface of the ocean to enjoy the moonlight only to be Captured by pirates

"Don't worry little pearl you'll still be able to go back to the sea but you'll have to come back when I command it"

Captain Blackbeard himself brought you inside his cabin as he carved an ancient symbol on the back of your neck making him the owner of your soul so you'll obey his every command while he handled you gently feeling proud he had the power of a siren under his control