Gen Urobuchi
The director of "Aldnoah.Zero" is Ei Aoki and the original creator is listed as Gen Urobuchi, both of whom had previously collaborated on "Fate/Zero". The main cast was announced by Aoki at AnimeJapan on March 22, 2014. Urobuchi produced the scripts for the opening 3 episodes of the first season, after which Katsuhiko Takayama took over, completing the remaining 9 episodes; Takayama continued in the second season, doing 7, with further writing credits going to Shinsuke Onishi (4 episodes) and Ayumi Sekine (1 episode).