In total, the Ryu sisters have two Gundams each.  The original Gundams (Hardsuits) and their new Colony Gundams specially made just for them. Hi Ryu was the test pilot for all the Gundams (including the guys').  When she tested the Hardsuit Gundams, the doctors discovered that because the Gundams were skin-tight, it created difficulty housing the weapons.  With that information, they created the Gundams used by Heero Yuy, Duo Maxwell, Quatre Raberba Winner, Trowa Barton and Chang Wufei.

Hi Ryu's first Gundam is made of a thin, light-weight, genetically modified Gundanium that moulds to her body shape.  The Gundam  is black and red (black is the main colour for all four bodysuits).  Relating to her fire connection, the weaponry on the bodysuit Gundam consists of fire attacks and a small trident weapon.

Koori Ryu's Gundam is black and ice blue.  The weaponry on her Gundam is relating to her connection with ice.  She also has a small gun that slots into a hilt on the side of her right leg.

Kaze Ryu's Gundam is black and yellow.  Her weapons relate to her connection with the wind.  It is also equipped with a small scythe that slots into a hilt on her left hip.

Mizu Ryu's Gundam is black and dark blue.  The weapons for her Gundam relate to her connection with water.  Mizu has two small twin-sickles the slot in either side of her wrists.

Midnight Fire is Hi's second Gundam.  This Gundam is similar to 01 and 05's Gundams.  The main weapon for Midnight Fire is a double-ended trident, which is carried.

Ice Wing is Koori's second Gundam.  Her Gundam is similar to 03's Gundam.  The main weapons for Ice Wing are two large short-range ballistic missiles contained in each leg compartment and two guns contained in the arms of the Gundam.

Wind Runner is Kaze's second Gundam.  Hers is similar to 02's Gundam.  The main weapon for Wind Runner is an extendable, energy beam-scythe that attaches across the back of the Gundam.

Water Dancer is Mizu's second Gundam.  Her Gundam is similar to 04's Gundam.  The main weapons for Water Dancer are two twin-sickles (like the ones on her bodysuit Gundam only larger).  They also slot into compartments on the wrists.

Shikari has her own specially modified mobile suit made by OZ.  It is called the advanced Taurus 29.  Shikari used her mobile suit in the battle against her sisters.  After it was destroyed, Shikari decided to give up being a pilot and get back to learning more about herself and her newly found sisters.

A trident is a three-pronged fork or weapon used as a fish-spear or a sceptre as attribute of Neptune or of Britannia.
In Christian mythology, the trident is associated with the Devil. Depictions of the Devil commonly indicate a trident as his sceptre.

Any object, usually a  weapon, capable of being thrown, fired or ejected.  That which is thrown or shot with intent to damage.
Missiles are often used in warfare as a means of delivering destructive force (usually in the form of an explosive warhead) upon a target. Aside from explosives, other possible types of destructive missile payloads are various forms of chemical or biological agents, nuclear warheads, or simple kinetic energy (where the missile destroys the target by the force of striking it at high speed).

Any weapon that has a barrel through which a projectile is discharged.  A hand-held weapon created to shot bullets from a barrel by pulling a trigger.
A gunner is a member of the team charged with the task of operating and firing a gun.

Agricultural implement for mowing and reaping, with long thing slightly curved blade fastened at an angle with handle and wielded with a long sweeping stroke.  The curved blade is swung by a bent handle held in both hands.
The scythe also plays an important traditional role, often appearing as weapons in the hands of mythical beings such as Father Time, the four horsemen of the Apocalypse and the Grim Reaper (Death). This stems mainly from the Christian cultural interpretation of death as a "harvest of souls."

Reaping-hook, short handled semicircular-bladed implement used for lopping, trimming, etc.  A smaller version of a scythe.
In Greek myths, the sickle was used as a weapon by Cronus and Perseus.