Yûki Kaji, who voiced Issei Hyoudou married with Ayana Taketatsu, who voices Koneko Toujou, from this series.

The character Asia Argento shares her name with the Italian actress, daughter of legendary horror/giallo director Dario Argento. Like the actress, she pronounces her first name as "AH-zee-ah."

Not released in New Zealand since "it encourages and legitimizes the pursuit of young persons as viable adult sexual partners".

In the english dub, Jamie Marchi (Rias Gremory) and Jad Saxton (Koneko Toujou) are the only cast members who have voiced the characters in every season.