The famous Japanese composer and music producer Yuki Kajiura has created musical scores for multiple projects by Bee Train since "Noir" (whose appeal lay to a large degree in its soundtrack). Kajiura has provided music for "Sign", "Liminality", "Madlax" (as part of FictionJunction Yuuka), "Tsubasa Chronicle", and recently "El Cazador de la Bruja". When explaining his preference for Kajiura's work, Mashimo once commented that "she's a storyteller who just happens to know how to write music". Another frequent collaboration is that between Bee Train and the musical duo Ali Project ("Noir", "Avenger", ".hack//Roots"). Generally, the music plays a just as important role in Bee Train's works as visuals and dialogue do, sometimes even drowning the latter (heard, for example, in ".hack//Sign", "Avenger", and "Madlax").