Kurama is not, for his own part at least, entirely sure that Hiei is aware of what's causing his illness. He seems so dead set on acting as if the fox is not firm in his convictions, but perhaps that's his own short-sightedness coming into play. There are still times he feels like he understood Hiei better the day they met than he does now, separated as they are by the fire apparition's insistence.

Sometimes it feels like only spite keeps the wall up between them, but others the fox isn't so certain that Hiei wouldn't truly be happier if he'd never returned in the first place. That his being back is as selfish and misguided as everything leading up to it was in the first place.

He raises an eyebrow at the shift in Hiei's expression, not quite as easy to dismiss as he might think or hope. Kurama is used to the fire apparition growing irritated with him, but this was something different. Only confirmed by the way he catches himself a second time, not fast enough to mask it on the return.

The fox crosses the room without hesitation, pulling the door to outside open without more than a passing glance in his direction as he does. “I wouldn't stay there if you're about to be ill. It will be impossible to sleep in this room tonight, once you've thrown up in it.”

Step outside, get some fresh air. Save them all the trouble.