There are many different characters on Jem and the Holograms. Some of the voice actors are Samantha Newark as Jem, Cathianne Blore as both Kimber Benton and Aja Leith, Cindi McGee as Shana Elmsford and Linda Dangcil as Carmen "Raya" Alonso.
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I imagine not seeing as the only two things they really have in common is the dual identity thing. Concepts just happen to resurface from time to time. That's how we establish Tropes.
See related link below to information regarding the voice actors in "Total Drama Island" .
I doubt if you would find jappenes naruto voice actors in America but it might be possible to find Liam'O'brian ( voice of gaara) in holly-wood or anywhere else in America.
Retro Bill
Every voice actor changes in InuYasha The Final Act