Aria the Scarlet Ammo is a Japanese light novel series written by Chūgaku Akamatsu and illustrated by Kobuichi. As of December 2023, 40 main volumes have been published by Media Factory under their MF Bunko J label. A manga adaptation by Yoshino Koyoka started serialization in the seinen manga magazine Monthly Comic Alive in September 2009. An anime adaptation aired between April and June 2011. An original video animation (OVA) episode was released on December 21, 2011. A spin-off manga titled Aria the Scarlet Ammo AA by Shogako Tachibana was serialized in Square Enix's Young Gangan magazine from November 2010 to May 2018, with an anime adaptation by Doga Kobo airing between October and December 2015.

Mei Nakabayashi , better known by her stage name May'n , is a Japanese singer from Nagoya. Aspiring to become a singer since childhood, she began her music activities in 2003 upon passing an audition held by talent agency Horipro International. She made her major debut in 2005 under the Universal Music label with the release of her first single "Crazy Crazy Crazy". She would release two more singles under Universal Music, before transferring to Victor Entertainment in 2008. That same year, she had her break as the singing voice of the character Sheryl Nome in the anime series Macross Frontier.