Demyx, the Melodious Nocturne (夜想のしらべ Yasō no Shirabe?, lit. Nocturnal Melody), is Rank IX of Organization XIII, and a reserve member of the real Organization XIII. He controls water, and uses his weapon, the Water Sitar, as a musical instrument to make water fight for him in battle. He commands the Dancer Nobodies. Demyx plays a minor role in Kingdom Hearts II, where he is tasked with tracking down Sora to liberate Roxas's "true disposition". Although he dislikes fighting, he is directed to use "aggression" against Sora and his companions to bring out Roxas. Demyx is a playable character in Mission Mode in Kingdom Hearts 358/2 Days. Despite his destruction, Demyx was brought back to serve as a member of the real Organization XIII, although he was soon demoted into a reserve member following the completion of the Replica Program. He would later betray them and help Vexen in his plans for atonement, assisting Ienzo in the resurrection of both Roxas and Naminé by collecting blank replicas for them before disappearing.