I did not make, but did edit the picture above.
I made the dress bow, eye bags-( I know it sucks-) her hair blend with the water more, and the slight rain in the corners, and her eyes different.

You'll probably notice a few lines I left, and if you zoom on the eyes, you'll see what I did. TwT💧

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Cussing, gore, Songs, Feels, Reader may have mood swings, Reader is not OP, characters may be off personality, forgive me if so please.
and also no judging, or mean comments please.

You, Y/n L/n, are.. er, WERE, a  2X year old.
You are from the original AU, UnderTale. In this AU, you are a human who fell down like the rest.
You went through the world normal, sparing and making a few friends. You spoke, just enough, almost as if knowing the right moments when to speak.
You left the monsters to smile faintly at your presence, you were a pacifist. You just passed by, making friends
..but when at the barrier, you didn't get to it, but you simply disappeared without a trace.
The monsters who were there, questioned how you disappeared. The barrier,still there, but no sign of you, like you disappeared.

Few years later, You've returned,but your smile left a frown.
Toriel found you, hugging you. You didn't return it,You took out your knife, she went to dust. Your face stayed unfazed however you had emotion. Feeling no pity or sadness. You felt like nothing happened. You did this with the others.

You didn't have a reset button, but somehow, the day restarted.
The time started,You did it brutally and  instantly. Everyone died, maybe sometimes they were killed horribly or without waiting. It was random how and when they died. Sans fought you,you fighting still unfazed.Soon after you simply didn't show up, gone now.

Those aware,remember you nice, simple, soft yet tough, then neutral, frowning, no care at all.They remember you,they were your friends, believing you wouldn't do such a thing, but still fought you, sometimes regretting it.
You wouldn't even stop and listen to Chara speak or comment, just killed the monster,skipping over looking at their stats,cut off Chara and killed them ,moving to the next after a minute.
You weren't in a rush.
After you left, Chara turned corrupted and a few more years later, turned nice again, meaning you weren't there during their resets.
Now, the Monsters, at the surface with Frisk and Chara, human again.
They joined the humans a year ago. It was still different, however not everyone knew they were free yet.

A faint light shines over as the black void opens,you force open your eyes, feeling heavy.You open your eyes, focusing, but close them, moving your arms up as you look away from the blinding sun, you look.

You're in a forest...?