He could die. As much as he wished to deny that, it was still a possibility regarding how the other humans who fell down here most likely failed to reach the exit. And he could kill as well, despite how sick the idea right now feels in the pit of his stomach. For all he knew, anything could happen. Good or bad. But for the sake of ensuring his return home so he could make things right for the resentful departure he made that could of been his last, he has to go forward and find out how his journey will turn out.
Toshi’s sketches of the ruins and Toriel were nearly finished, ready to leave behind tomorrow so at least one person will remember. He takes small comfort in that, in at least having met someone who was willing to give him as much of a chance as he can to survive. He knows she wishes that he stayed instead, but her motherly concern only made his guilt feel heavier in his heart as the memory of his mother calling after him as he left was still fresh in his mind.
“Doubt it’ll be as easy as some stories would tell these kinds of tales...”