Keith Silverstein  Keith Silverstein (born December 24, 1970) is an American voice actor. Most of his voice over career has been for anime, most known as the voice of Kimimaro Kaguya in the "Naruto" series, Hisoka in the current dub of "Hunter x Hunter", Robert E.O. Speedwagon from "JoJo's Bizarre Adventure", Vector the Crocodile from the Sonic series, and Char Aznable in the English dub of "". He also received critical praise for his performance as Johan Liebert in "Monster". Silverstein has also ventured into radio work, which includes doing the voices of FBI agent Peter Bourland and Santo in Focus on the Family's long-running Christian radio drama "Adventures in Odyssey", George in "I'll Be Home For Christmas", Carl in "Sunday Chronicles", as well as multiple radio spots. He has also provided the voices for dozens of video games including "League of Legends", "AION", "Resident Evil", "Sonic Free Riders", "Sonic Colors", "", "", "Tales of Graces", and "Overwatch". As of 2012, he dubbed Mr. S in "Doraemon", Kenji Tsukino in "Sailor Moon" and also voices Doctor Kirby O'Neil, April O'Neil's father in Nickelodeon's "Teenage Mutant Ninja Turtles". In 2015, he voiced the recurring villains Ulric, Brute, and Rascal in "Glitter Force", which was released on Netflix. He also voiced the main villain in the CGI animated show "" which aired on Nickelodeon. He has been married in Rosemary Do since October 10, 2010. He has three daughters. Silverstein is Jewish.