This Bitty Goop Sans was never separated from his brother, who is a Bitty Dream Sans. He very easily absorbs negative emotions from around him such as depression, anxiety, anger, sadness, fear, and hate. When he does so, he becomes covered in a viscous layer of black, goopy slime. He is a bit irritable and has low patience. He has a no-nonsense personality and way of thinking. Despite his differences he is very loyal to his Bitty Dream Sans brother since they’ve always been together.