Occupation: Berserker, mercenary, bad ass, taking names, dog walker.
Combat ability: Guts is a talented and fearsome fighter. He wields the Dragonslayer sword which can slay and otherwise chop up people, aliens, beats and assorted shrubbery. His left arm is prosthetic and includes magnetic grip, super typing speed and a concealed cannon. Added to the years of front line experience he also wears the Berserker armour, an ancient, cursed suit of armour that allows the wearer to overcome his physical and mental boundaries in combat greatly increasing his fighting strength. The down side being his inner demon takes over making him a threat to friend and foe alike. It's like having the American army on your side
Other notes: Don't make him angry, you wouldn't like him when he's angry.
Age: Unknown, apparently 18
Occupation: Armoured Gynoid, Rei clone (Red eyes, blue/grey hair,
Combat ability: Being of the non-human persuasion her powers are highly advanced. Her arms can morph into a multitude or ranged and melee weapons including cannons, drills, can opener and blades. She possesses long range sensory devices making sneaking up o her very hard. Not content with this she can summon weapons such as her F-scyth and, (and this is where it gets silly) she can self repair. As a final resort she can slap on the "Tertiary Weapon System" where she basically becomes a man sized space ship of death.
Other notes: Despite her logical manner she is compelled to eat lines of ping-pong balls if they are left in a line. She's basically Pac man.
KOS-MOS and Guts encounter each other in an abandoned gold mine, deep below the Earth's surface. The tight, narrow passage are unstable. Explosives are ill advised.
Age: At most: mid 20's. Probably 17-19.
Occupation: Ninja, Body guard, possibly most under appreciated character in the FMA manga.
Combat ability: Being an elite ninja body guard of the heir to the Throne of Xing Ranfan proves to be a talented and acrobatic fighter. Despite underestimating Ed Elric she held her own (although she did fall victim to the old "pulled of his arm and used it as a decoy" trick). She proved to be more than a match for Envy and even survived an encounter against the Ultimate eye (by the way there are spoilers in this post). Currently minus one arm she still has no problems with getting into fights. She has particular skill with throwing weapons but doesn't like fighting without her mask.
Other notes: She really is in Fullmetal Alchemist! Read the manga, it's miles better than the anime.
Occupation: School girl, Loli, walking/flying WMD.
Combat ability: When not reading Shoujo manga for dating advice or studying for some test Chise flies about destroying cities for the War effort and liberally killing enemy troops. For the ability to fly and cause mayhem on a scale rarely seen all it cost was her humanity. A high price and one that she did pay on her own free will. She is a person divided. Her human part is saddened at what she does and misses her fading senses, the weapon half delights in her increasing power. Depending on her mood she will either be a sitting duck or a one girl War machine.
Other notes: Cute as a bugs ear.
The two young ladies meet in a vast yet flooded Metropolis. Picture New York half city, the buildings half under water then quadruple the area. That's where they're fighting.
Commence noise exchange.
Popo is voting for Guts (Magnetic grip + Android = -1 Android.) and Cheese.