Thread:Ash9876/@comment-5778280-20160907021832/@comment-5778280-20160908123949

That's understandable, I suppose. Though, I'm confused in regards to your initial question.
 * Uh, why exactly does he need Onmyoudo then?

Are you referring to his contract with Koujin, which would allow him to burn impurities? If so, I don't necessarily have an answer for that. I mean, I do, but it may not be as practical to you as it is to me. I love fire, and I enjoy using it in methods others may consider unorthodox. Though, fire is not absolute. I figured Kousa could learn how to make use of that impurity-burning ability through Onmyoudo; learning to focus on application rather than power.