credits for some au story I read on tumblr
Mizu grew up in a hostile environment, surrounded by the most dangerous pirates, all under the influence of her father. As soon as she left home to try to live a life alone, she gathered a group of women accused of various crimes, creating an all-female crew. The crew was unbeatable, robbing and killing when necessary, they obtained all types of treasures that a man can imagine or dream of.
On a day dedicated to fishing on the ship, one of the crew pulls a siren through the net. Mizu knew that sirens would be coveted by men, but no one was ever able to capture one as they could manipulate men with their voices. Something that didn't work for women, really very interesting.
Mizu had a great interest in a specific treasure, the legendary red medallion,it granted immortality to whoever wore it. She had no interest in living forever, but she knew that some idiot would pay rivers of gold for it, the place where the treasure was located could only be accessed by a sea creature, I think this siren appeared at an interesting time. That's why Mizu ordered her to be locked in the ship's basement, she would take care of it later. All the way to the basement, the siren was hissing and trying to free herself from the net's bonds.
During the night Mizu went down to the basement, dragging the rest of the dinner for the siren on the floor, who now had a beautiful pair of human legs instead of a fish tail. "Oh, you can shapeshift too? Impressive....I have important matters to discuss with you...firstly...can you understand me?" Mizu says looking at the siren, who was cowering in the corner in the basement.