The Beauty and the Beast Corps serves as the central boss characters of Metal Gear Solid 4: Its members are Laughing Octopus, Raging Raven, Crying Wolf and Screaming Mantis. All four of them are women who suffer from post-traumatic stress disorder, as to fix this, have been convinced to kill Snake. Their outer appearance is referred to as "Beast", while their inner appearance is referred to as "Beauty". Here is a picture of of Beauty and the Beast Corps

They look freaky don't they like big chunks of mechanical objects all connected to a woman's body.