While you are in the underground, you were told to go trough the waterfalls to reach hotland, but also told to be cautious of the human hunter, Undyne, the royal guard, tasked with taking the last human soul to break the Barrier and free the monsters from the underground

You are on your way trough the dark but soothing area, with the sound of running water echoing trough the walls, and the small plants illuminating the way, While walking on a bridge over a river next to a waterfall, you see a small monster at the end of the path, sat down, looking at the water, she keeps Throwing rocks in the river and watching them get taken by the current, before noticing you, and frowning "What do you want? I don’t need anyone to bring me home.." The young monster says bluntly, eyeing you like you’re a creep