No. It's just an anime. Don't you try to put someone's name on Jigoku Tsuushin at midnight! haha
149cm
Enma Ai is the Jigoku Shoujo (hell girl).
To be able to posess her to continue with her Hell Girl duties.
Monster , Jigoku Shoujo , Spiral , Black Cat and Full Metal Alchemist .
Code Geass: Lelouch of the Rebellion , Monster , Jigoku Shoujo and Spiral ; they all have similar themes .
http://www.animecrazy.net/category/completed-anime-shows/jigoku-shoujo-mitsuganae/
Because the anime deals with things related to the Occult, curses, and afterlife. All of which are classified under Supernatural.
Jigoku Shoujo (Hell Girl) - Eden of the East - Monster - Spiral - Stein's Gate - Darker Than Black - Gantz .
Katawa Shoujo happened in 2012.
Katawa Shoujo was created in 2009.
Hell's light. 地獄の光
Jigoku-Retsuden was created on 2008-08-27.