Talk:Sans/@comment-27523715-20160529021639

My headcanon of backstory: When he and his dad (Gaster) was working on the (time) machine, and Sans tested it, Sans got the glowing eye, the ability to teleport and the ability to know other timelines. Gaster was mentally scarred, and a few days later he commited suicide in the CORE, just when Papyrus was born. This is why only Sans uses the Gaster Blaster, but may have handed one to Papyrus for a special attack. Sans decided to not loose his younger brother, like he did to his dad, so he would kill anyone who killed his brother, and was extremely protective of him. He makes jokes, and smiles to think of the pacifist route.