After Being Tossed from her Galleon in mutiny, Yumi made a new friend in the form of a mermaid named Charles. Charles was sent from the Pirate Lord to give her a medallion that would save her life. The medallion would transform the wearer into a mermaid, and vice versa if it were removed. It is one of her priceless treasures, and uses it to keep up with ships under the waves.
