on 22 April 2013
Blue Exorcist (Ao no Exorcist) volume 9 contains chapters 33 to 37 plus a bunch of bonuses including some 4-koma, a demon guide, and a report on the stage play.
It is rated T+ for older teen (16+) due to violence, suggestive situations and some adult themes.
The Kyoto/Impure King arc reaches its conclusion in this volume and then there's a short arc about a Kraken that has been attacking ships and the exorcists have been asked to help stop it. (Every manga needs a beach arc)
Not the best volume but still really enjoyable. We see what Yukio really thinks of his brother and the two get into a huge argument which isn't really nice to see but it does help the character development a lot.
Some of the art is extremely cute in this volume, especially when they are blushing. The mangaka can draw facial expressions really well!
A new arc starts in the next volume, I'd like to see more of True Cross Academy and hopefully more Mephisto!