This may sound pretty obvious

and I realized this some time ago, but I just wanna put it into words now.

Kougami and Tougane are basically Akane’s light and darkness.

Kougami made it his mission to console her whenever she was feeling down, thereby keeping her hue from getting clouded (though it never seems to anyways)

Tougane’s desire was to hurt Akane so badly that her hue would turn pitch black, the complete opposite of Kougami. 

In short

Kougami was Akane’s savior

While Tougane was Akane’s destroyer 

DAMMIT, WHAT I WOULD HAVE GIVEN TO SEE A FIGHT SCENE BETWEEN KOU AND TOUGANE FOR AKANE’S SOUL