He appreciates her concern, but he's not here to look like an idiot. That, and he's how the hell that would even work, but the realities of it don't really matter at this point, he's currently too busy coughing to really care. Eventually, however, like it always does, his coughing subsides, and he can feel his lungs start to breathe properly again.

He's not her brother. Why the hell would she even want to call him that? God damnit.

"Aki's your—" he pauses again, breathes. That's probably a bad place to start. "Shit." How the hell is he even supposed to explain. "I know how this is gonna sound, but I need you to listen. Then you can think what you want. You remember the fire?"

Or perhaps her world didn't have one. But he'll know that soon enough.