Okay, lately I've been curious about the River Person and finally decided to do a story with him. :)

This story will take place five years before Frisk freed the monsters, by my OC will not be one of the six children who fell before Frisk. This is going to be a father-daughter story with River Person and my OC, just to let you all know. :)

Undertale belongs to Toby Fox. I only own Kayla.

Mystery Of The River

Chapter 1: Fall

"Alright, this is the place," said a man to three other people. Two were young men that held a struggling twelve-year-old girl in place and another was the man's wife.

"Let's just get it over with," the wife said. "I want to call social services and then we'll have another boy in the family."

The young girl struggled to get free of them. "But I thought you adopted me," she protested.

The woman looked at her in disgust. "I told the social workers I wanted to adopt a boy, not a girl," she snapped. "You're just a worthless piece of trash."

The man nodded to his older sons. "Throw her in," he said.

They nodded and dragged the young girl over to a hole in the mountain and pushed her in. "Goodbye, brat," one of them said as she screamed as she fell into the mountain.

"Come on, let's go," said the other brother. "She's not going to survive long down there."

They left, leaving no evidence that they had even been there.

Kayla tried to grab onto something to stop her fall, but soon landed on something that cushioned her fall and she took a moment before sitting up and seeing if she had any broken bones. Surprisingly, she had none, but immediately got up, knowing she had to find a way out of the mountain.

Wasting no time, she took off, running down a path that had snow banks on either side of it, but she paid the snow no mind as she kept running. "I've got to find a way out," she told herself and continued running until she was running along a path that was next to a vast river.

In her haste, she didn't see that the water had turned the snow into ice on the path and suddenly, she slipped and fell to the ground, but the ice had no traction and she slid straight into the river.

The cold water took her breath away and she struggled to get her head above water, kicking her legs hard despite the cold water already starting to numb her lower body. With a burst of effort, she got her head above water and gasped for air, struggling to stay afloat. While the current wasn't strong, she didn't know how to swim and the cold water wasn't helping matters by chilling her to the bone and making her lose feeling in her legs and in her arms.

"Help!" She screamed, hoping someone could hear her, but a second cry for help got stuck in her throat as cold water hit her face, causing her to cough.

She began focusing on staying afloat when a boat pulled up and she grabbed onto the side of it, coughing as she struggled to hold on. A moment later, Kayla felt two hands grab her arms and lift her up out of the water and into two arms. She coughed again and shivered from both cold and relief to have been saved. Something warm was then placed around her and she immediately tried to burrow into it to dry off and try to warm up and get some feeling back in her numb limbs. While it helped, fatigue set it and she passed out, her mind going blank.

River Person quickly caught the young girl he had saved from the cold river before she fell over as she passed out and he tucked the warm cloak around her more. "She's only a child," he said to himself.

Knowing the King was looking for one more soul to break the barrier, River Person shook his head. He wouldn't turn this girl in to the King. He looked at her now, gently brushing a gloved hand over the girl's long wet black hair. He wondered how old she was, though he guessed she wasn't yet a teenager. Seeing her shiver in her sleep, he guided his boat to his home in Hotland and lifted her up into his arms, looking around to make sure no one saw them, and he headed into his house, which was a simple hut with five rooms and a kitchen.

Taking the young girl into one of the bedrooms, he set her on the bed and found more blankets, wrapping them around her to not only help her dry off, but to try and get her warm again. "Hang on, child," he said softly as he sat by her, keeping a close watch on her as she finally started getting warm and her shivering died down until her sleep became more peaceful.

River Person didn't leave her side for the entire night.

Hmm, quite interesting. Why did River Person save Kayla? Stay tuned for the next chapter! :)

And please leave a review, but no flames! Constructive criticism is welcomed.

GoldGuardian2418