Kosuzu Motōri is a character in the series Touhou Project, and the main protagonist of Forbidden Scrollery. She is a Human Village resident and a worker at the Suzunaan book renter. According to her, she's the No.1 collector of the demon books in Gensokyo. She has a sweet personality, considerate and optimistic, polite and cheerful with her customers and her friends. She has the ability to decipher books by only touching them, and to read youkai auras.
- She has a great deal of respect for Reimu. She is convinced that no harm will come to her from dealing with the youma books, because she is sure that Reimu will come to save her if anything happens.