Manga
From Tardis Wiki, the free Doctor Who reference
Manga were a type of comics originating in Japan. The term was also used to refer to stylistic elements common in these comics, as when Darius Pike told Jorjie Turner that she looked "manga" in her Magdalene Academy uniform. (TV: Sirens of Ceres)
Behind the scenes
Tanya Adeola has three Sailor Moon posters in her room in TV: For Tonight We Might Die.