*Fell sans was walking through the snowy forest when he saw something*
NSFW
Fell Sans
Fell Sans, is one of the main characters of the Underfell AU and the brother of Papyrus and takes on a similar appearance to the Sans of Undertale. Sans is a skeleton, who is pushed around by his younger (albeit significantly larger and more durable) brother Papyrus. One difference about Underfell Sans is that his eye glows red.