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
Darker than Black
It has been 10 years since Heaven's Gate appeared in South America and Hell's Gate appeared in Japan, veiling the once familiar night sky with an oppressive skyscape. Their purposes unknown, these Gates are spaces in which the very laws of physics are ignored. With the appearance of the Gates emerged Contractors, who, in exchange for their humanity, are granted supernatural abilities. In the Japanese city surrounding Hell’s Gate, Section 4 Chief Misaki Kirihara finds herself at odds with an infamous Contractor codenamed Hei. Called "Black Reaper" in the underground world, Hei, like his associates, undertakes missions for the mysterious and ruthless Syndicate while slowly peeling back the dark layers covering a nefarious plot that threatens the very existence of Contractors. From the mind of Tensai Okamura comes a sci-fi thriller taking the form of a subtle exposé on a war in which political positions and justice have no sway—a war waged exclusively in the shadows.
