Doremy Sweet is a powerful baku, or dream-eating youkai, featured in the Touhou Project series, first appearing in the game 'Legacy of Lunatic Kingdom.' She governs the world of dreams, consuming bad dreams and manipulating dream worlds. Doremy serves as both an opponent and a guide to the protagonists, often providing cryptic advice or tests. With her calm demeanor and playful attitude, she plays a crucial role in the series' exploration of dreams and the boundary between reality and illusion.