Codename Sailor V was written by Naoko Takeuchi in 2004. This book series is a prequel series to the Sailor Moon series.
Naoko Takeuchi went to Kyoritsu University of Pharmacy, where she received a degree in chemistry and became a licensed pharmacist in 1985. Almost all of the enemies in the Sailor V and Sailor Moon series are named after different elements and gemstones. She worked as a shrine maiden at the Shiba Daijingu shrine. She submitted her first manga work, Love Call to Kodansha, which won her an award, at the age of 19. She then continued working on manga.