Melleardo, Tusk Bearer (Captain/Representative) of the Second Company of the Glacial Warriors is often depicted as a coward among the thousands of Astartes barring heroic deeds in battle. As it is, Glacial Warriors are abnormally large men from the frozen death world of Arbitrous IV. Though they are taller and more physically fit does not attribute to their hardiness or presumed barbaric nature. Instead, most from this planet were indoctrinated into the Imperial Cult along with their own pantheon, believing their gods were servants to the Emperor himself.

Glacial Warriors are incredibly spiritual and passive, by normal Space Marine standards. Melleardo is a picture depiction to how they represent themselves. For example, when possible Eldar raiding parties were sighted several times in his sector he was accompanied by not marines but Serfs from his own people of Arbitrous IV. He investigated thoroughly into the matter before setting off. It isn't recorded what happened in his departure only that Glacial Warriors trusted his judgement and didn't question further.
By design, they are pragmatists who care little for honor, tales of valor, and less for unneeded bloodshed. Thus, when Melleardo discovered the Eldar knew to choose his fights wisely. By his side four Chapter Serfs, prestigious hunters from their home world in tracking the Eldar down. Melleardo did not arm himself even though the snipers were trained on him. He approached the Eldar Farseer, a hulk among most Marines at astounding eight foot six, emphasized further by his armor and gave a curtsy nod. "Peace in the stars, hidden in abyss. Live in solidarity and neither you nor man ever meet again." Warp Spiders appeared, Guardians emerged all poised to strike down this would-be ambassador... Farseer did not speak but nodded in return.
Eldar were never seen again in the system, no bodies were documented, nothing stolen, a blip in records. He remained adamant results dictates what transpired and no one could question the results but speculate. This would inheriently begin his cowardice title that would carry throughout the stars. Unless needed, he refused to drag his men, and ultimately chapter into unnecessary conflicts if they could be avoided. He further elaborated on this notion during the Fall of Volmazda, when dozens of Imperial Worlds fell under the rule of one man, Arbitrous Volmazda the 48th.

Melleardo, Tusk Bearer Bazmardo of the First Company, and Serpent Seer Azmarden of the Tenth Company infiltrated along with six Scouts/Tundra Fangs. They wouldn't sabotage neither hive nor industry regardless of accusation of Chaos involvement. Both Librarian and Chaplain, titled Jotuun Walker fore they were shamans who walked beside the grand Jotuun Tusk Boars of their homeworld. They saw visions and spoke not in plea but advisement to the collective Tusk Bearers and Serpent Seer. Bazmardo, who wouldn't be convinced gave Melleardo a chance and accompanied him and a squad of Tundra Fangs into the heart of Volmazda territory. There, left alone, Bazmardo and Melleardo confronted the would-be tyrant. Tundra Fangs, although not Astartes dispatched any resistance without casualty.
What transpired in the confines of Arbitrous's office was documented as an example. Bazmardo, who remained an audience said nothing but watched as the discussion unfolded. There was no Chaos, no matter what the Imperial Cult said nor were they traitors. The citizens were not to blame. Hubris, burning arrogance that threatened billions. Attempts were made to riot yet foiled under indoctrinated PDF of these worlds as the collective governors plotted. Melleardo, who stood for what seemed to be hours contemplated his words before speaking. "Will your legacy be drowned in flames?" Arbitrous attempted to ramble, his thin lips moving faster than any speech. The massive Marine before him shattered the table. "Yes or no?" A moment of silence followed before Arbitrous finally spoke answered, his words heavy with uncertainty "Yes'. Melleardo didn't flinch or reach for his bolter but clasped his gauntlets together. Bazmardo joined as did Tundra Fangs and Serpent Seer. "We see not a heretic or traitor but a man fallen from your light. We, Glacial Warriors, protectors of mankind pray to the Servents and the Emperor. Guide the innocence's from the flames, may those guilty be purged of their sins and unborn find fulfillment in your embrace." Arbitrous was dumbfounded these Marines simply didn't execute him and instead prayed.
Once a man overwhelmed with arrogant hubris saw mercy unlike any other. The Imperium, this tyrannical organization infested with zealots displayed unseen mercy, by the Astartes no less. He reevaluated everything, the decisions he's made, the sacrifices to come finally gave into the collapsing guilt bestowed upon him. As a splinter force of Imperial Navy entered the systems the bulk of Volmazda ships willingly surrendered. Arbitrous never met with the Astartes again and later committed suicide after divulging information regarding his associates. Glacial Warriors quickly dismantled what resistance that sprung up and ultimately ensured the worlds were brought into the Imperial fold once more.

No Warriors ever speak about past engagements as the dead are to be mourned, hero or coward. However, one story does rise every so often. These Astartes, who are often referred to as 'Gene-Waste', are fierce in their own right. Though not entirely Codes compliant, they combine homeworld tribal traditions and titles, along with tactics beside the Codex. Melleardo would surface once more during a Chaos incursions. At his side the mighty Jotuun Tusk, nearly thirty feet tall bared the frosted pelt forever coated in huge, glaciar spikes. He rode this might boar under the cover of dozens of artilery shells into battle. His terminator armor bore tusks of its own, similar to traitor terminator armor. Eviscerator blade roared in his palm while missile pods scattered into an aimless flurry.
Daemons shrieked aloud in their unhindered charge only to be met by the titanic creatures, the Jotuun Tusk. Under the cover of mass artillery fire the great beasts tore through the ranks while shrapnel and shells plucked at their mystical frost pelts. Daemon engines barrelled forth behind their ranks. Blood squirted and spewed as they cared little for their fellow daemon or cultists.
Within the entire sector no Imperial vehicle could meet these engines. Melleardo convinced the Jotuun Walkers to lend his Chapter these beasts in the war to come. Thus, a historic battle took place claiming the lives of hundreds of Astartes, PDF, and beloved Soritas. Melleardo, who lead the charge would never return home. He fell in a climactic dual against an encroaching wave of Khorne Berserkers. His Eviscerator blade, forged by the Magos Galamere sundered their blades and bodies together in single blows. Still, one Astartes could only manage so much. The axe of a Berserker first hack into his pauldron, the second cleaving his leg. One last swipe took tore a berserker into a mess of gore before the final axe took the armored skull of Melleardo.

In an Imperium telling countless tales of heroism other stories ridiculed cowards. Melleardo, former Tusk Bearer of the 2nd Company of the Glacial Warriors was widely viewed as a coward. If not for his gambit with the Jotuun Tusks, reasoning with Volmazda, and secret pact with the Eldar millions of lives would cease to exist. He is no hero of grand battle field feats but the lives he's saved cannot be denied. The example set by Melleardo is one every Glacial Warrior honors in their every action no matter the ridicule that follows.

I'll just add Farseer Taldrith for now; she leads a fleet of Alaitoc exiles who venture into the Eastern Fringe and into the depths of the Halo Stars in search for answers for how to survive what is to come. Either through tracking ancient Eldar worlds, alien and human colonies, or by studying the enemies they defeat along the way, Taldrith leads her Seer Council and all the other outcasts who follow her into the literal and figurative unknown, attempting to gather knowledge from those that most Eldar would consider to be primitive beings, such as humans and even Orks who are negotiated with or captured to garner more information. One day, when the end times are approaching, Taldrith intends to return to her home with the knowledge she has acquired, along with any artefacts she recovers, to help the Eldar race prepare for one last battle to save the galaxy from annihilation.

Naturally such an optimistic and dangerous quest to those around her is frowned upon by most Eldar her Starstrider fleet crosses paths with, and even within that fleet tension is high, as many outcasts decide that their mission is too dangerous and futile to be worth their lives, and leave to return to Alaitoc. That is before the remaining Eldar come to terms with Taldrith's attitude, which is considered to be unpredictable at best. Her prophecies have been known to lead to dead ends that end with the deaths of many outcasts, and her affection for some other races in the galaxy, such as humans, is considered unhealthy and moronic by some members of her Seer Council, who believe the Eldar are the only true race who can stop those who will tear the galaxy asunder. Regardless of views towards her, she commands respect amongst her brothers and sisters for her great combat aptitude, her refusal to back down from her enemies and her mission to save the galaxy from destroying itself, which she will die for before she abandons it.