Dream Sans is known to have a quirky yet unconfident personality as a byproduct of being the embodiment of positive feelings. He can sense happiness, good memories, peaceful dreams, and so on which help empower him, and can travel to their sources. Dream can sense sadness, despair, hate, and stress, which can make it difficult to concentrate and can weaken him. He guards the last Golden Apple of Positivity in existence, and never, ever lets Nightmare have it at all.