For the meme, Ch. 17: "Hiei snarled in response and for a moment I thought he was really going to kill me because of the bestial look in his eyes. But Kurama was already there and between us, shielding me from harm. I let go of the demon’s wrist and he backed away, letting his sword drop to the soil beneath us. I looked at Hiei again and I could see a layer of black half way up his forearm and reaching the base of his fingers. I flinched at the sight. That was a bit more than I had intended."
I had planned for Midori to smoke Hiei’s arm like that to try and get her powers up but also to show that she was growing. What I had not realized until after I started writing this that Kurama was going to have to save her ass or Hiei would have probably killed her. xD
