Maaya Uchida is a Japanese voice actress and singer who works for I'm Enterprise. She won the Best Rookie Actress Award at the 8th Seiyu Awards. She is best known for her roles such as Rikka Takanashi in Love, Chunibyo & Other Delusions, Irina Shido in High School DxD, Hiyori Iki in Noragami, and Catarina Claes in My Next Life as a Villainess: All Routes Lead to Doom!.

Riddle Story of Devil is a Japanese manga series written by Yun Kōga and illustrated by Sunao Minakata. It was serialized in Kadokawa Shoten's Newtype magazine between the September 2012 and November 2016 issues and is licensed in English by Seven Seas Entertainment. This series, set in Kagawa Prefecture, tells a story of a young undercover assassin named Tokaku Azuma who chooses to protect her target-turned-friend Haru Ichinose from 11 other assassins who each want to claim the student's life and an extraordinary reward.