Rule-the-world Stories

There was once two twin girls who had never met. They were no ordinary twin girls though, they could control the world through their eyes. One was good and could control the ocean, the other was evil and could control the earth. Pearl, the one who controlled the ocean, wanted no one to die and to all live a happy life. Ivy, the one who controller earth though, was hell bent on ruling the world with her evil ways. These to twins are bound together, meaning, they can not hurt each other without hurting themselves. If they ever meet, what will they do? Who will come to Pearl's aid?