They were searching for a cure. Those idiots were using him as an experiment. The snake-ningen-Orochimaru was ill, and they wanted to recreate his youkai healing.
While Hiei knew that not all ningen were like this, the ningen that were happened to be the ones that made him want to wipe the entire damned race off the face of all three worlds.
In the…how long had it been? Three months?…three months he'd been trapped here, he had grown to hate the Shigure-ningen-Kabuto, even more than the red-headed buffoon.
And considering Kabuto wasn't hitting on Hiei's sister, that's saying a lot.
Three months. That's how long he had been in this scuzz-hole.
Three months of anger, and hatred, and pain. Always the pain.
If they'd even bothered to ask, Hiei could have told them that his healing ability couldn't be replicated.
He could have, but his youkai pride would have probably stopped him from doing so.
But, for now, he waited. Because at the moment, the only thing that kept him going was the thought that he might, somehow, get out of this scuzz-hole.
And, if he happened to take off Kabuto's smugly grinning head while he was at it, well, he wouldn't complain.