Episode 13

Proof (証明) is the 13th episode of the Ao no Exorcist anime overall and of the first season. It first aired on July 10, 2011.

Synopsis
Shura Kirigakure, a high level Exorcist and former apprentice of Father Shiro was acting as one of Rin's classmates tasked to investigate his connection with Satan. With orders to kill him if it were proven true, she is divided between fulfilling her obligations and following Shiro's request to look after Rin in his place if something would happen with him. Her doubts are cleared when she confronts Rin and finds that Shiro was actually raising him like a son.

Manga & Anime Differences

 * In the Manga, Rin Okumura's flashback to the night when Shiro Fujimoto was killed is not shown.


 * In the Manga, Rin Okumura does not become enraged at Shura Kirigakure nor does he fight her.


 * In the Manga, Shura Kirigakure does not stab Rin Okumura.


 * The scene showing Yukio Okumura treating Rin Okumura's wounds is not shown in the Manga.


 * The scene where Rin Okumura go's out at night with Kuro, where he experiences a flashback to his childhood and then him and Kuro play fighting is not shown in the corresponding Manga chapter to this episode.