The themes are composed by Naoshi Mizuta. In the Japanese version of the game, the themes are accompanied with vocals from singer Aimee Blackschleger. "Unseen Intruder" was the first song Mizuta wrote for Final Fantasy XIII-2, and that it is a vocal song with rap makes it a piece that reflects director Motomu Toriyama's desire to have a sound that's unlike the typical Final Fantasy title.