Card Lores:Crying Banshee

This little girl, is extremely manipulative always aiming to get what she wants by crying. Eventually, when people were getting fed up by her fake crying she was ignored and when she was endangered by a sea beast. Taken alive, and killed. As a Ghost, she takes up the same role, crying to lure in Sailors and take their lives.

The great swordsman is no exception, however, rather than dying. She was offered a place on his crew, to use her abilities and lure in his enemies. She remains loyal to the captain, even after the ship had sunk.