Ar tonelico Qoga: Knell of Ar Ciel

Ar tonelico III: The Girl's Song that Pulls the Trigger of World's Demise (アルトネリコ3 世界終焉の引鉄は少女の詩が弾く Aru toneriko Sekai Shūen no Hikigane wa Shōjo no Uta ga Hajiku) is a console role-playing game produced by Gust and Namco Banda] for the Sony Playstation 3. It is the third installment in the Ar tonelico series, taking place in the Reyvateil-ruled country of Clustania, which is within an area known as the Sol Cluster. Clustania is situated on the third tower in the world of Ar Ciel, which floats above the uninhabitable Sea of Death. It is the first 3D game in the series.

R.A.H. System
Reyvateils can sing in a language known as hymmnos to attack. However, depending on the actions of the player, the hymmnos will "combine" and change the music. These changes can have added effects such as increasing a vanguards attack power.

Diving
During the game Aoto can "dive" into the Cosmospheres (spiritual world) of heroine Reyvateils to craft Song Magic. Various personalities exist within the Cosmosphere, and the player can choose to have the Reyvateil fight in the clothing of one of them. Because the personalities who wear these costumes have differing Song Magic preferences, the costume will influence the R.A.H. system. Diving additionally deepens the bond between the Reyvateil and Aoto, which in turn enables the Reyvateil to "unleash" her clothes for greater power.

Known Characters
Aoto (蒼都)} (Seiyū: Noriaki Sugiyama)
 * The main character of the game and an apprentice in high elevation construction. He's reckless, but always finishes what he starts. He never liked Clustania, but after meeting Saki, he starts to view Clustania as an enemy.

Saki (咲) (Seiyū: Mai Gotou)
 * A main heroine and Reyvateil who was created in a research institute for a project that would have a great impact on the world. She escaped before the project was executed and was on the run for several years before she met Aoto. When she's extremely emotionally strained, she can use a power known as Miracle.

Finnel (フィンネル) (Seiyū: Eri Kitamura)
 * Another main heroine and a clumsy β-type Reyvateil who works in a restaurant known as Yokkora, which is situated on the Eternal Road. She seemingly has a significant connection to the existence of Clusternia.