Thread:Silver-Haired Seireitou/@comment-5778280-20160129045220/@comment-2089817-20160129071439

Well, I, Seireitou, would most likely suggest simply making it a specialty of his Shinuchi form. You could probably say something along the lines of, Kōsa's soul is all about instinct and the natural world, so his true self reflects his surroundings. The purity of nature and so forth. Nature is always pure, but outside forces disturb and corrupt it. Left on its own, nature knows what its doing, but the balance is upset when humans go in for construction in forests and whatnot. Therefore, one can say that nature represents purity of being in the most simplest sense, and Kōsa's Shinuchi is one that personifies that because it is the type of person he is; one who dislikes the complex and seeks the most simplest ways to achieve results. And all that.

So, in his Shinuchi form, he filters out the corruption and takes in only the purity of energy; the energy he needs, just as plants do. Of course, he can't fight and filter in energy at the same time, it'd be like looking left and right at the same time, so I suppose a good drawback is that, instead of a time limit, he needs to pause and take in power before rushing in to attack.

I probably could give you a better answer after I get some sleep, since it's late for me and I'm planning to head to bed now, but hopefully that points you in the right direction.