Bulwark

Subject B-U8, identified as "Bulwark", is a pair of Lekgolo Hunters formally under research by the Office of Naval Intelligence in an effort to weaponize Lekgolo colonies for military usage. 
==Biography==
===Origin===
The Lekgolo worms that would come to be known as Bulwark was formed when it split off from its prior colony in 2554 inside the CCS-class cruiser known as the "Revealing Lance", which sank to the bottom of the Puertorrican Trench in 2552 in the end of the war. 
===Research Subject===
Later that same year, the Office of Naval Intelligence conducted an investigation into the remains of the cruiser and discovered the numerous Lekgolo colonies inside. They would be later transported to a secure ONI Black Site in Cuba, where they would test applications for the Lekgolo worms in human technology. Despite the overall results being less than initially hoped, one colony made its way to the weapons depot, and formed into a Hunter pair while integrating an automatic grenade launcher into its left arm. This pushed away general application research and trials for Lekgolo combat units began in Project HOMUNCULUS.
===Pet Project===
Despite many lekgolo colonies being unruly and a very dangerous task to ONI tamers, the colony named B-U8 was very fascinated with UNSC weaponry and cooperated with its Human leaders. The research team assigned to B-U8 thrived, eventually even designing UNSC arm cannons for the pair.
By 2556, Bulwark was already Culebra Base's favorite pet project. They were named "Memento" and "Mori" to differentiate between them. Every researcher and base personnel doted them as their fascinating new 'war machine' began responding to certain commands and cooperating much more than the other colonies.
===Goliath Incident===
On April 27th 2556, the host Lekgolo colony recovered from the derelict CCS formed into a singular Mgalekgolo form, identified as a Goliath by ONI. Although the facility hoped to learn more about the Goliath, it soon went into a rampage, almost breaking free from the facility. The Facility deployed both Spartan Samson and Spartan Pascal to prevent the Goliath from escaping but were having difficulty.
Bulwark, having just completed a live-fire test, was still equipped with its prototype arm cannon and moved to assist the containment effort. Both bond-brothers concluded that the host would cause not only the deaths of the tamers that had given them their new technology but also their possible termination.
S-IVs Samson and Pascal caught the Goliath attempting to break through the garage blast-door. Both Spartans engaged the Goliath and slowly whittled it down while avoiding the Goliath's heavy slams. Soon afterwards, Bulwark arrived and both bond-brothers fired their machine guns to gain the attention of the Goliath. They fired grenades onto the body, successfully splitting off the large colony into smaller snake-like pocket colonies. Due to their speed, the pocket colonies wormed their way up the walls and into cover. Both Spartans-IV and Bulwark fired at the pocket colonies, killing several crawling up the walls and roof in attempts to escape. The remaining pocket colonies managed to reform and take control of a maintenance Cyclops, and attempted to attack the Spartans and bond-brothers. "Memento" managed to bash the clunky attacks away with their Arm Shield and were able to fire another batch of grenades, destroying the mech and remaining lekgolo from the host colony.
On May 5th 2556, pressure from the UEG due to the risk presented by Goliaths forming in Humanity’s homeworld forced the base to be decommissioned. Bulwark was transferred off-world along with the research staff and their security detail aboard the Sahara-class heavy prowler, Luminous.
===Alpha Base===
March 6th 2557, Bulwark was deployed for a live-fire exercise against a URF camp on Harvest, established in the remains of what was Alpha Base. The pair arrived during the night and slowly approached the base. The garrison deployed two warthogs to intercept but were destroyed by Bulwark's grenade launchers. The base quickly went into high-alert and locked the main gate. The remaining insurrectionists woke up and fortified the main gate. They waited for several minutes, hearing the pair bash the main gate and cause massive dents until they finally blew it open with their explosives. The soldiers fired upon the pair, but the pair used their arm shields and cover to protect themselves while fighting back. They successfully killed the cyclopes and grounded a Pelican they had inside the base. After seeing that the situation wasn't improving, the insurrectionists fled inside the base, locking themselves inside the fully fabricated base, with vent systems and heating. It didn’t take long for Bulwark to break through, but it was enough for the insurrectionists to hunker down inside. With the slow progress that was happening in the main entrance corridor, both bond brothers improvised. Bond brother “Memento” would distract the main hallway troopers while Bond brother “Mori” came out of its armor and into the vents in an effort to disable the power supply.
They were successful and soon the power went out inside the base. While Memento stayed blocking the only way out, Mori went on the prowl: using the vents and darkness to its advantage, Mori ambushed outlying soldiers, they would drag them into the vents, or ambush them in the hallways. Screams could be heard from Mori’s recording software: the researchers were both disturbed and intrigued by Bulwark’s grim adaptability and ingenuity. 
The last of the hostiles regrouped and did a final, desperate attempt to get away. One by one Mori picked them off until only three would faced Memento in the entrance, who were killed soon afterwards. Mori reintegrated with its armour and they were retrieved back to the Luminous. 
===Back on Earth===
Eventually the Luminous stopped roaming and research was reestablished inside a hidden facility back on Earth in July 2nd 2557, in Puerto Rico. While inside the hidden facility, Yuki managed to contact the bond-brothers, slowly earing their trust.
On October 28th, 2558, the Created Uprising began and Yuki pledged allegiance to Cortana but removed all traces of Bulwark's facility, so as to prevent their capture and/or destruction. The research staff, Spartan detail and bond brothers stayed quiet in the research facility for more than a year.
On December 2559, Cortana was missing. Yuki, in an attempt to finally break free, infiltrated many prisons and released all those that were sympathetic to the UNSC forces still in the fight. The breakouts caused chaos. Bulwark, along with Spartan Pascal and Samson protected the local prisoners and sympathetic civilians from Created forces appearing to quell the uprising. Bulwark rescued Yuki from the Data center from promethean forces. Once the Eternal Servitude, an allied CAS-class Assault Carrier entered the system, the Spartans and bond-brothers protected and later boarded transports fleeing the planet and were picked up by the CAS. Once it arrived at the Eternal Servitude, they disembarked from its transport and began fighting against the Promethean forces currently boarding the ship, assisting the elites and grunts that were being overwhelmed. Once the ship was secured and before Created fleet reinforcements could return, the Eternal Servitude escaped from the system.
==Appearence==
Traditional Mgalekgolo have Covenant armor plating, known for its smooth and curved shape and corners, with a vaguely diamond-shaped Blast Shield on it’s left arm and the well-known focus cannon with protruding Fuel Rod rounds integrated into the right arm. The six quills protruding from the back are lightly bent by the end of the quill.
Bulwark’s UNSC armor is drastically different in appearance, however the general design remains somewhat the same.
The “Head” is pentagon-shaped, with yellow lights that appear as eyes appear on the flat side facing the mgalekgolo’s front. Its shoulder, arm and leg armor plating vary in shape, but all follow the similar design for covenant hunters, but without the curved edges and distinct green color. Its Blast Shield, is a thicker adaptation of the honey-comb structured armor the rest of the plating possesses, and in a perfect diamon-shaped. It is also slanted, to not only ricochet various types of munitions, but also deal much more permenant damage to structures and organisms with the shape it possesses. Its arm cannon is connected to the large rectangular back on the bondbrothers, feeding machine gun rounds through an external belt while the grenades are passed through the internals of the right arm to reduce the likelihood of destination from enemy fire. The Quills on its back are all specialized sensors for the worms to detect their surroundings much better than traditional hunters. To maintain the sensors, they only protrude slightly out from their armor inside the munitions back, reducing the likelihood of them being snapped off or removed. 
==Equipment==
Bulwark is equipped with a custom-built arm-cannon specifically built for the bonded gestalt. It boasted an integrated M460 Automatic Grenade launcher with side-mounted twin-liked M247H Heavy Machine Guns. These belt-fed HMGs were connected to the armour plates on their back, allowing it to sustain suppressive fire for extended periods of time.
The armour worn by the bond-brothers is inspired by the starship-grade armour of the Halcyon-Class, featuring a smaller, honeycombed structure which is padded with cushioned insular lining. This allows it to withstand heavy impacts and small-arms fire from a variety of weapon types, without sacrificing mobility or weight.
==Personality==
Due to being a hive consciousness, it doesn't precisely have a personality but simply behaviours. Though ONI researchers observed Bulwark's curiosity on foreign weapons and their multiple uses it could find applications with. 
Spartans Samson and Pascal observed Bulwark acting defensively when allies were in danger, though researchers are dismissive of their observation. They can all agree however that when required, Bulwark has no qualms with ambush tactics in their swarm form and the terror they cause.