This artwork was the winner of the Blue Exorcist contest held at the Ao-No-Exorcist group at Deviantart.
It was done by user ToshaSquare from Russia, who resulted the winner :-)
It was done with watercolor pencils and I'll submit more information right away!!
I just love the use of contrasts and the characterization.
This is her Deviantart account, which features many great artworks!
ToshaSquare on Deviantart