Via Starwars.com:

Usually the voice actors of animated Star Wars are closely associated with one, or maybe two focus characters in Star Wars: The Clone Wars or Star Wars Rebels. It’s hard to imagine anyone else playing Kanan Jarrus other than Freddie Prinze Jr., or another actress voicing Asajj Ventress besides Nika Futterman. But while certain actors may be synonymous with a particular character for a period of time, it might surprise you just how versatile the talented voice actors of Star Wars actually are. Cast members rarely voice just one or even a couple of characters. In fact, many voice dozens of different characters over the course of a series!

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