GLaDOS

GLaDOS battles Sherlock Holmes in an unofficial Epic Rap Battles of History(http://www.youtube.com/watch?v=GLS8lXB2whU).

Information on the Rapper
GLaDOS is the main protagonist in the Portal series, a video game series made by Valve. Her name is short for 'Genetic Lifeform and Disk Operating System'. She has killed every scientist in Aperture Science research facilities. Her main enemy is Chell, the protagonist of the game. She is not organic, and is entirely composed of mechanical robotics. She supposedly 'died' in Portal, but after she was heard singing 'Still Alive', she came back in Portal 2, more vicious than ever.

Lyrics
I don't have an ass, I'm a computer genie,

You're a flawful CO Head, with a double billed beanie...

Trivia

 * She is one of the only rappers that never appeared in an official rap battle (The others being Michael J. Fox and Chucky).
 * However, her oppenent, Sherlock Holmes, did appear in a rap battle.