Hiroyuki Sawano
Music for the series is composed by Hiroyuki Sawano. For the first fifteen episodes, the opening theme is by Eir Aoi, while the ending theme is by Miku Sawai. From episode 16 onwards, the opening theme is "ambiguous" by Garnidelia, a duo consisting of vocalist Maria and composer , and the ending theme is by Sayonara Ponytail, though an extended version of the original ending theme returns for the last portion of episode 24. Aoi's song "Sanbika" was used as an insert song to accompany climactic events in episodes 3, 7, 11 and 23.