Yumemi Okazaki is a prominent character from the Touhou Project series, first appearing as the final boss in 'Phantasmagoria of Dim.Dream.' She is a human scientist and professor from the outside world, known for her keen intellect and ambition to study the magical phenomena of Gensokyo. Yumemi’s appearance marks her as a rare non-native to Gensokyo, and her scientific approach often clashes with the magical inhabitants. She plays the role of an antagonist and source of curiosity about the boundaries between science and magic.