Debi Mae West is an American voice actor who, to date, is best known as the English voice of Meryl Silverburgh in Metal Gear Solid and its 2004 GameCube remake. She was recently confirmed to be reprising the role in Metal Gear Solid 4. She can also currently be heard as Reycom and Hideaki on the anime series Zatch Bell! and now as Tsunade in the popular anime series Naruto.
Information taken from Wikipedia.