User blog comment:CNBA3/Nine Demon Gate Theory!/@comment-7418318-20130927123522

He could also personify anger, since he didn't seem to care about hurting others in his quest to defeat the "demon".

Or if you take inversions, he could be the counter to Heresy, which would tie in with the title of the chapter "Exorcism" (or "Purification" depending on the translation).