Seventh Soul Sans.

He wants to send Frisk back to surface.(His crush).After go through multiple problems....Both him and Frisk teleported into a cave that has no way out.... knowing his brother won't let her go he decided to stay in the cave before leaving again.He falls unconscious after teleported in the cave.He was the Captain at the Snowdin Town....he wears a dark armoury and a blue caped.He has a scar which happen when he fight against his brother Papyrus.Also the monsters are also against him because they needed one more soul to completed and breaking the barrier which is being said by their King.....Asgore.He was kind-hearted person who can't tell people the jokes that can actually make them laughs....and he has a wisdom where he needs to capture the last Human souls needed....but he can't because Frisk is his only friend(Or girlfriend).