Dream Sans is from the Dreamtale AU and is brothers with Nightmare Sans, his fallen and sworn enemy. 

Dream is a overwhelming positive person, and incredibly nice, but is known to be not overly confident. He cares about everyone and makes sure to care for others. He is also known to be quirky, and sometimes overly dramatic, while also very talkative. He acts as mediator in conflict. He is not friendly to the Bad Sanses, except for Cross Sans, who he is friends with. 