In The Reunion Files, Nojima had stated that Sephiroth's only true goal in the film is taking revenge on Cloud, who he saw as a rookie SOLDIER. His revival had been decided to occur early on in the project, but not the exact reasons or means of how he would be revived, and these details were decided at later dates. Sephiroth's dialogue was also made to sound profound, as "he thinks on a level higher than humans", and his hair and eyes were exceptionally difficult to animate. Various minor details were made to emphasize Sephiroth's other-worldly character; he was never made to blink, almost never grunted or breathed, and even in the heat of battle kept his voice calm and controlled. Nomura says that when creating Sephiroth, his appearance was set but he had trouble deciding what kind of voice he should have; once Toshiyuki Morikawa auditioned, Nomura knew he was exactly what he wanted. Morikawa also noted that, with Sephiroth's on-screen presence, he knew his final lines had to be done properly, and with input from the director, gave Sephiroth's iconic final words a sense that "he's not done yet".