The Beauty and the Beast unit member who uses a rail gun in Metal Gear Solid 4: Guns of the Patriots is Crying Wolf. Solid Snake encounters her in the snowy wilderness during the game’s Shadow Moses chapter.
Crying Wolf is a heavily armed female soldier wearing a large mechanical battle suit. Her boss encounter combines long-range fire, camouflage, snow, and tracking, requiring Snake to identify her position while avoiding powerful attacks. The rail gun is one of the most distinctive weapons associated with the fight.
The unit’s other members have similarly emotional names: Laughing Octopus, Raging Raven, and Screaming Mantis. Their names and behavior reflect the trauma-based themes of the game. Crying Wolf should not be confused with Wolf, the sniper from the original Metal Gear Solid, even though both characters are associated with wolf imagery.