Genesis huffs, a mean little sound, both mocking and self-deprecating. Him allowing this vulnerability, this closeness, doesn't mean he has to like the context of it. Genesis may not push Sephiroth away, but that feeling of humiliation still makes his throat burn.

"A medkit? Please, nothing helps. I know it well by now, the only thing I can do is wait."

For the pain to go away, for him to get used to it, or maybe for his demise. Who knows. At least Genesis is sure that he can take Shinra down with him with Sephiroth at his side.

(It could be worse. He could be alone, and he allows the proximity by moving his head against Sephiroth as if resting it there, quietly.)