Most humans probably would, but since this place is October's second chance at life, she figures she can try to give back somehow. And if keeping this really weird looking guy alive and thus the rest of the passengers safe, she can do that. It might also be that the pain helps her know for certain that she's alive here, that she's not stuck in some twisted purgatory, waiting for her final judgement.

She pulls her hands out of her pocket as she walks over to him, the only sign of her nerves the slight quirk of her eyebrow. "Do I get cookies this time, when you're done?" It's nothing like giving blood, but she can still joke if she wants.