Ar tonelico
While the three games have their stories set in different places and have different characters, they fundamentally share the same world. The world of ', Sol Ciel, is formed by an enormous Tower called "Ar tonelico" and a floating continent called the "Wings of Horus", while the world of ', "Metafalss", is a harsh world formed by a small tower surrounded by an artificial land called the "Rim", and finally, "" is set in world called "Sol Cluster", in which a white tower with a unique design is surrounded by a rock formation called the "Great Fang".