Dreamsprite is a Duel Monster Spirit that has appeared numerous times in the different anime series. It is based on the card of the same name.
Yu-Gi-Oh! Duel Monsters
This monster first appears as one of several spirits pleading for Yami Yugi's assistance against Dartz. She appears in a flashback as Dartz narrates the fall of Atlantis, and appears again during the final battle against The Great Leviathan.
Dreamsprite was shown in a flashback as one of the spirits in Schwank turned into a stone slab of a Monster Card with a Negative Level.