In order to make the Clone Troopers sound like individuals, Dee Bradley Baker recorded every voice separately and gave each one a different inflection. He liked to write down a particular adjective for each one. For instance some sound a bit younger, others a bit more proper, whereas another may sound like a bully, or a grunt. During later seasons, he was able to record all of the voices in the same take.
According to James Arnold Taylor, the producers encouraged him not to do a straightforward impression of Ewan McGregor. Instead, the voice he uses for Obi-Wan Kenobi is a mixture of McGregor and Sir Alec Guinness.
Dave Filoni based the character of Ahsoka Tano on the mannerisms Carrie Fisher displayed as Princess Leia in the original Star Wars trilogy. Furthermore, she combines Anakin's brashness with Obi-Wan's measured judgment, reflecting the shift between the Republic and the on-coming Empire.
During the entire show, Anakin Skywalker and General Grievous never come face to face. This was intentional due to a line in Revenge of the Sith (2005) in which the two state that they had never met before.