After manga volume 8, during series' climax, the author felt he "got a little hasty" and ended the long battle between Alucard and Anderson. As a result, he thinks Alucard's battle against Anderson had a better show of battle in comparison to the previous battle against Anderson were both fighters were nearly equals. The reason he thinks so is because he had a time limit for completion when he was drawing them. In regards to Walter's betrayal, Hirano decided to use him as avillain by the time Alucard, who had been sleeping underground, revived, to face Integra and claimed taht despite the close experience both character has, Walter was still clearly weaker than Alucard. Among the multiple changes the original video animations (OVAs) "Hellsing Ultimate" had in comparison to the manga was the concept of Alucard wielding his guns with his teeth, something only done in Gonzo's television series. This was done with Hirano's approval.