- Casting Gag: Both the Drama CD and anime series has Ami Koshimizu and Jun Fukuyama voicing the titular protagonists respectively, using their previous experience as a supernatural economist and her human companion.
- Relationship Voice Actor:
- This is not the first time Jun Fukuyama (The Hero) and Ami Koshimizu (The Demon Queen) played closely-related roles together.
- It shares some seiyuu with Durarara!!:
Trivia / Maoyuu Maou Yuusha