Her smile's

a girl who hides in a facade of smile's that were one's full of happiness, but are now fake and full of despair , even no one's noticed she will hold the secrets close to her heart and berry it deep , till the time comes and she sees them one's more along with the final battle that was one's everlasting and went in loops to haunt her mind.

till the day she was reborn in a new world of hero's and villain's which side should she choose is up to her to decide but even so i wander what her future hold's.

if you don't know undertale suggest that you play the game or read\watch comics of it.