Hiro, despite bing smaller than Lucifer, carried him when the other passed out. When he was conscious he pointed him in the right direction, leaning on him heavily for support. He constantly gave him water and food, not even thinking about himself but focusing on Lucifer's well being.
When they finally arrived after what seemed like years, he desperately looked around to the villagers, "Please, he's been poisoned, we need the antidote!" He begged. Hiro had not slept, too focused on Lucifer, and was about to pass out himself.