Code Geass: Soubou no Oz  

Code Geass: Oz the Reflection, Code Geass: Soubou no Oz - SIDE:Oldrin, コードギアス 双貌のオズ

Code Geass: Soubou no Oz is a spin-off series that follows the events of the first and second seasons of the TV anime. It features two perspectives - one from Orpheus Zevon, a young terrorist with the Knightmare Frame Byakuen who seeks revenge against his lover's killer, and another from Oldrin Zevon, a girl from Britannia Empire's anti-terrorist unit Glinda Knights who pilots the KMF Lancelot Grail.