Lori Alan

From the Metal Gear Wiki

Lori Alan (born July 18, 1966), sometimes credited as Lori Allen is an actress, voice actress, and stand-up comic. She provides the voice of Diane Simmons in the FOX show Family Guy, various characters on the Nickelodeon show Hey Arnold!, and Pearl on SpongeBob SquarePants. She also made an appearance in an episode of Friends in the shows ninth season.

She is best known for providing the English voice of The Boss in Metal Gear Solid 3.