Janice Hiromi Kawaye is the voice of the show's protagonist Jenny, XJ-9. She voices both the English and Japanese parts in the episode Speak No Evil, since Janice speaks fluent Japanese due to her being of said descent.
She is also known for her role as Ami Onuki from Hi Hi Puffy AmiYumi. Kawaye also provided her voice for both Sonya (a.k.a Numbuh 83) and Lee (a.k.a Numbuh 84) from Codename: Kids Next Door.