<Dd> Assistant to Luthor . On her role in the film, Okamoto said "It was so fascinating . I didn't have a big speaking role . I used to act as sassy girls all the time as a model so that wasn't so challenging to me . But I enjoyed it so much, being mean . I tried to be mean ." On Okamoto's casting, Snyder said "Tao is a striking presence whose beauty is aptly rivaled by her amazing abilities as an actress . I'm really excited to have her joining us on this adventure ." </Dd> <Ul> <Li> Robin Atkin Downes as Doomsday: </Li> </Ul> <Li> Robin Atkin Downes as Doomsday: </Li> <Dl> <Dd> A monstrous creature created by Kryptonian technology, initiated by Luthor adding his own blood and General Zod's DNA into the system, after learning how to do so from the Kryptonian AI aboard the crash site of the alien ship of the same origin . Downes portrayed the character through motion - capture and voice - over work . The role was kept under such heavy secrecy that Downes did not know who he was playing until the second trailer was released . On his role, Downes stated that he was proud to be part of the film and expressed his admiration in helping bring Doomsday to life in Batman v Superman: Dawn of Justice . When asked why Doomsday was chosen to be in the film, Zack Snyder stated "To go up against heroes like Batman and Superman, we wanted to introduce one of the DC Universe's most iconic and powerful villains", further explaining, "He is essentially an unstoppable force . He poses a real threat to the world within the film ." Snyder has confirmed Doomsday will return in the DCEU, stating "Well, you have Doomsday, right? He doesn't just crawl out of the ground . He has his own mythology, right? So that has to be explored ." Downes has previously provided voice roles for various DC animated films and shows as well as DC video games . </Dd> </Dl>

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