Mayu Ōtsuka

Mayu Ōtsuka (大塚 真由 Ōtsuka Mayu) is Section 4's liaison officer with the National Astronomical Observatory of Japan. In her private time, Ōtsuka is an otaku who enjoys anime and does anime/manga-based fanfiction stories. She was in the manga club at university and has numerous anime posters, figurines in her and trophies in her room. She is currently in to the “Rose of Maurice” anime. She writes stories for a hobby under the pen name "MayuMayu" and has many doujin and claims to have many fans. She has hayfever. She is adept at winding people up, such as suggesting to Matsumoto that she is interested in older men like him