Beauty and the Beast Unit

Origins
It is yet unknown where these cyborgs were first created or when, it is also unknown if they are even cyborgs. It is unknown who created them, for what purpose, and what are their motives for being this way.

Re-Imagined For The 21st Century
The unit is made entirely of females who have been damaged by war thanks to Post Traumatic Stress Disorder. Their minds were then taken so that they could be turned into these War-Machines.

Each member of the unit manifests their names during battle. Crying Wolf is constantly sobbing amid wolf cries, Laughing Octopus demands her victims to 'laugh with her' as she crushes them to death ,Raging Raven shouts on the battlefield for her enemies to 'feel her rage' while Screaming Mantis (as her name states) screams.

They are rumored to part of a new FOXHOUND unit commanded by meryl silverburgh

Human Form
During GDC2007 Hideo Kojima pointed out the ultimate question with these bosses: "Can these beautiful ladies return to human form like in classic films? You'll have to find out in the game." A week later on the Kojima Productions Report, Ryan Payton and Voice Director Kris Zimmerman confirmed that they have two different forms.

Laughing Octopus
It is shown in the GC2007 Trailer that Laughing Octopus has cybernetic tentacles extruding from the top of her head, which she can use to crush people by simply wrapping the arms around the person and squeezing them to death.

Raging Raven
It is shown in the GC2007 Trailer that Raging Raven is shaped like a bird possibly a Raven. Her massive wings have blades on which she can use to cut through a human torso, and she can also fire her armament of 6 Sidewinder missiles. Raging Raven also holds either a barrel fed magazine shotgun or a grenade launcher.

Crying Wolf
It is shown in the GC2007 Trailer that Crying Wolf is shaped to be a wolf. Thanks to her posture and strength she can stop vehicles, and use brute force to make her way through a crowded area or street. She can also use the machine gun attached to her back. Crying Wolf can also howl like an actual wolf, it is unknown if this is to mimic the GEKKOU as the way they use cow noises to make the enemy lower their guards.

Screaming Mantis
It is shown in the GC2007 Trailer that Screaming Mantis has arms protruding from her shoulder area, these arms are also seen holding puppets, on the left is one shaped like Psycho Mantis while the other is The Sorrow. Her abilities are to use strings and force soldiers to kill other soldiers, and bend the soldiers in an un-natural way, killing them. It is unknown what else these 'strings' can do. Screaming Mantis also has knives on the front and back arms extruding from her shoulders.