アルトネリコ
The universe that serves as the setting for the "Ar tonelico" series differs from our own in that it was formed by the Song interwoven out of waves by the original atomic nucleus called EXA_PICO. Therefore, this universe is structured in a form in which the planets, continents and life forms, all are created from the waves produced by the songs sung by higher-order life forms, and regardless of their position in the cosmic hierarchy, every life form sings out the waves that compose itself, allowing it to exert influence over life forms of a lower order than itself.