President of the maritime nation, Isola. Despite her young appearance, Rosanna is actually quite old. Rumors state that she ate the heart of a mermaid when she was young, greatly extending her life, but they have never been confirmed. With her political prowess and elderly wisdom, she never ends up on the wrong side of a deal. Rosanna has spent her long, long life focused entirely on Isola, and thus highly values friends she can open up to.