Keith Silverstein is an American voice actor, known for lending his voice to English Versions of Japanese anime and video games, affiliated with Bang Zoom! Entertainment, Viz Media, Studiopolis and Funimation. He is best known for his roles as Johan Liebert in Monster, Vector the Crocodile in the Sonic the Hedgehog video games, Robert E.O. Speedwagon in JoJo's Bizarre Adventure, Hisoka in the 2011 version of Hunter × Hunter, Ōgai Mori in Bungo Stray Dogs, Ulric, Brute, and Rascal in Glitter Force, Gabriel Agreste a.k.a. Hawk Moth (Shadow Moth in season 4 and Monarch in season 5) in Miraculous: Tales of Ladybug & Cat Noir, and Zhongli in Genshin Impact.