Gregory D. Eagles (born October 28, 1970) is an American actor, voice actor, writer and producer. He is best known for voicing the Grim Reaper in Grim & Evil and its spin-off The Grim Adventures of Billy & Mandy. He is also known for voicing Brother 6 and Rokutaro in Afro Samurai, Aku Aku in the Crash Bandicoot video game franchise, and Gray Fox in Metal Gear Solid.