Sans is a shorter skeleton who in the game Undertale, according to his Steam trading card, wears a hoodie that will never zip up and black striped pants. He is always grinning, and rarely moves his mouth when speaking. He has white pupils that disappear when he is serious. When he tells a lie, he turns a blind eye . When you fight him to a certain stage, his eyes will flash blue and yellow like neon lights , the game author calls him: mind control. For example, when the gravity control is used at the beginning and end of the battle, it will flicker obviously. For more inquiries, please check Game Costumes.
