Small Face Sans

Small Face Sans is a revised closed-eyes drawing of Sans and a resident of Undertown. He appears as an enemy when Dark Dorws attempts to fight him, Epic Sands, and Overworld Sans for annoying him, and drags Dorws into it.

Appearance
Small Face Sans looks like a corrupted copy of Sans, only with, as you may have guessed, a smaller face. This face is located in the bottom left corner of his face, and lacks Sans' normal white pupils, as well as seeming to be leaking or cracked, with additional black lines under the eyes.

His body is very similar to that of Sans', the only real differences being the lines being located in the middle of his pants much like in his in-game battle sprite and his slippers being white rather than pink. The hoodie also lacks the gray zipper area.

Personality
Unlike his fellow, more lighthearted allies, Small Face Sans has less tolerance for games and more violent tendencies. He doesn't join Dorws to play Smash, instead simply leaving off to the left. He also stabs a sharp bone at Dark Dorws a single time, being the only serious attack from the opposing side in the whole battle,

Abilities
Small Face Sans' only displayed attack is called Skull Stabber, and he has 20 HP. He can be assumed to be powerful, but it is uncertain.

Trivia

 * Small Face Sans' appearance in the CYOA was the first time he was ever shown with a body.
 * Small Face Sans shares some similarities with Undertale's Chara, having leaking eyes, 20 HP, and a stabbing attack.