III — Emperor's Children
- Back from the Dead: Some marines display a resistance to damage beyond the limits of normal Astartes. This is known as the Mark of Lucius, after the resurrection of Lucius the Reborn during the Bleeding War.
- Broken Ace: After being held as prisoners of the Dark Eldar for most of the Heresy, the values of the Emperors Children shifted from pride, nobility and the search of perfection to endurance, suffering and self-sacrifice.
- Challenge Seeker: The Emperor's Children constantly improve their skills in combat, to the point that theyre among the best duelists in the entire Imperium.
- The Speechless: The Brotherhood of the Silent Scream cut off their own tongues for their perceived failures, removing themselves from the broader legion structure, staying isolated on a monastery on Chemos and lending their services to inquisitors.
- The Ace: He restored the ecology of Chemos to the point that it is still mostly perfect thousands of years after his disappearance. He took a legion of barely 300 Astartes and restored it in just a few years(there were only 300 Astartes left at the time of Fulgrim's arrival due to a genetic defect known as the blight). He endured most of the Roboutian Heresy being tortured by Dark Eldar, and even managed to save the Emperor from Guilliman at the last possible moment.
- Revenge Before Reason: Fulgrim got lost in the Webway because he ignored the warnings about the imminent collapse of Commorragh's suns while pursuing Fabius Bile.
- Scars Are Forever: His body is still covered in the scars from the torture he suffered at the hands of Dark Eldar during the Bleeding War.
- Crippling Overspecialization: While hes one of the few individuals on the entire galaxy able to understand the Emperors gene-forging skills, his abilities in other fields are far from the same level. This comes back to bite him in the ass after he betrays Thrar Hraldir.
- Even Evil Has Standards: Fabius Bile finds the Raven Guards Apothecaries to be utterly disgusting.
- The Magnificent: Known as "the Clonelord".
- Send in the Clones: Just like his canon counterpart, his speciality is cloning and gene-forging.
- Xanatos Gambit: His plan for the fall of Chemos. By putting a copy of his mind in a clone of Fulgrim, he ensures that either Fulgrim comes and Fabius has something to match him, or he doesnt come, proving to Fabius that hes dead.
IV — Iron Warriors
VIII — Night Lords
XII — World Eaters
- Nice Guy: Angron had a much brighter past as a free man, leading him to becoming a noble, genial figure who pretty much everyone who saw the value of compassion got along with. His Legion follows his example.
XIV — Death Guard
- Dirty Business: Called in when this becomes necessary.
XV — Thousand Sons
- Animated Armor: Those Astartes that are unable to survive the Rubric are reduced to dust, with their souls trapped inside their armor.
- Arch-Enemy: With the Space Wolves. Even before the Heresy began.
- Cursed with Awesome: The Rubric of Ahriman shields every marine from direct corruption by Chaos and increases their psychic abilities beyond ordinary librarians. However, only a minority of the aspirants actually survive the process, the rest become Rubric Marines.
- Magic Knight: Every single legionnaire of the Thousand Sons is a psyker, and they're just as talented at fighting as other Astartes. However, a combination of their lack of numbers and their specialized skill set forces them to use human reinforcements known as the Spireguard to be able to operate at their fullest.
- Remember the Alamo: When they fight against the Space Wolves, their battlecries are in remembrance of the burning of Prospero, along with promises of revenge.
- I See Dead People: The first signal an Astartes of the sixteenth legion receives of his transition into a full-fledged Herald is the ability to see the ghosts of the wrongfully slain.
- That Man Is Dead: When a Herald starts his pilgrimage to Prospero, his brothers mark him as dead on the legion's rolls of honor.
- Vengeful Ghost: After the awakening of Vindicta, the Heralds of Prospero that die remain as spirits and conduits of Vindicta. Theyre known as The Vengeful Ones.
- Barrier Maiden: To defend his sons from the flash-change, Magnus shielded them with his own power during the Great Crusade. When hes cast down by Sarthorael, the flesh-change comes back.
- Genius Bruiser: Due to his battle with the Psychneuein Prime (the biggest specimen of a species that feeds off psychic energy), Magnus learns that physical strength can have as much use as psychic might in battle. He later transmitted this lesson to his legion.
- Incorruptible Pure Pureness: After looking into the heart of Tzeentch, Magnus denounces him as a lie and rejects him and Chaos entirely.
- Worf Had the Flu: During his first battle with Sarthorael the Ever-Watcher, Magnus was weakened by warding his entire legion against the Flesh-Change, to the point where Sarthorael was able to curse him and trap his soul into the warp.
- Dented Iron: Ten millennia of constant battle against the enemies of mankind has left Khayons face a scarred mess.
- The Magnificent: Known as "the Black".
- Red Baron: His alternative title is "Scourge of the Wolves", gained from being a staunch enemy of Leman Russ and the Sixth Legion, the Thousand Sons' collective Arch-Enemy.
XVI — Sons of Horus
XVII — Word Bearers
XX — Alpha Legion
I — Dark Angels
- Complexity Addiction; Between the amount of layers in their hierarchy, the fact that some operatives have secret orders from the Grandmasters (or Lion ElJonson Himself), and the constant change of meaning in the titles of any given rank. Only the Alpha Legion can keep up with the constant changes.
- Manipulative Bastard: Due to their allegiance to Tzeentch, this is to be expected. Their tactics can be confusing at first sight, with the full consequences only being revealed centuries after the campaigns end.
- Torture Technician: One of the tasks of the Interrogator-Chaplains is to have the imperial prisoners broken with torture, and then released back to the battlefield, either as infiltrators or with the purpose of damaging morale.
- Hoist by His Own Petard: While rupturing the Webway allowed him to hunt Cypher personally, it also let Lorgar escape from the Chaos Gods and take the Sword that was Promised.
- Orcus on His Throne: Lion El'Jonson hasn't left Cysgorog since the end of the Heresy.
- Wild Child: Just like his canon counterpart, he spent his first years of life alone in the forests of Caliban.
- The Atoner: His current mission of carrying Luthers sword to Terra was undertaken after a previous failure. [[spoiler:He was supposed to be on Caliban and help Luther in the battle against Lion ElJonson, however. He was baited by the Tuchulcha Engine into searching for his cousin aboard the Dark Angels flagship.
- Barrier Maiden: As the last of the original Fallen, his life is the only thing stopping Lion El'Jonson from recovering his full power. With his death, this position goes to Luther's daughter Morgana.
- Heroic Sacrifice: The Sword that was Promised is anathema to all Daemons. By passing it to Lorgar, he purges the Ouroboros's shard from his body, dying in the process.
- The Magnificent: Known as "Lord of the Fallen".
- Resurrective Immortality: The Ouroboros heals Cypher's wounds every time he dies.
- That Manis Dead: As far as he knows, Zahariel died fighting against Luther.
- Charles Atlas Superpower: While Luther wasn't even a full Astartes, by the time of Lion's arrival on Caliban he was strong enough to match the Daemon Primarch's might, while suffering from previous wounds and without Cypher's help.
- The Magnificent: Known as the "Master of Caliban". His alternative title is "the Arch-Betrayer".
- Worf Had the Flu: The damage that Luther sustained during the battle with the Ouroboros resulted wounds that hadnt fully healed by the time of Lions arrival to Caliban. Cypher speculates that, had Luther been at his full might during his battle, he would have been able to kill Lion El'Jonson permanently.
V — White Scars
VI — Space Wolves
VII — Imperial Fists
- Arch-Enemy: They hate the Blood Angels with passion due to the broader conflict between Khorne and Slaneesh.
- Blood Knight: Naturally, after pledging their allegiance to Khorne, they've became this. Rogal Dorn in particular is the most violent of them all, his moods constantly switching between explosive rage and icy fury.
IX — Blood Angels
- Arch-Enemy: They really do not get along with Imperial Fists because of them being aligned with Slaanesh, who is utterly opposed to Khorne, and vice-versa.
- Humanoid Abomination: Thanks to glamours, all of the Sanguinary Marines appear as beautiful and charming as their Primarch, to the point where everyone would be completely distracted and weep at their beauty. However, if someone manages to tear off the glamours and reveal the Sanguinary Marines' true selves as eldritch, horrific-looking monsters, they'll get mad.
- I'm a Humanitarian: They are obsessed with the Thirst, which drives them to consume the flesh and drink the blood of sapient creatures.
[[folder:Primarch Sanguinius]]The Daemon Prince of Slaneesh.
- Cloudcuckoolander: After losing his sanity Sanguinius lives in an imaginary world where he never betrayed the Emperor.
- Hero Killer: He slew Horus during the Siege of Terra. This ended up psychologically breaking him, to the point where, like canon!Fulgrim, he would constantly clone Horus in hopes that he could have his beloved brother by his side. Unfortunately, since all of Horus's clones have the mental capacity remember who killed the original, Sanguinius would kill him, and would repeat the process again, and again, and again...
- Tragic Villain: He made a treaty with Slaanesh not for his personal gain, but to save his Legion. It cost him his sanity.
X — Iron Hands
- The Dragon: Ferrus Manus to Roboute Guilliman during the Heresy.
XIII — Ultramarines
- Red Baron: He would carry canon!Horus's title as "the Arch-Triator" this time.
XVIII — Salamanders
- Despotism Justifies the Means: Salamanders are obssessed with obtaining power over lives of other sentient beings and will do everything to hold it.
- Dragons Are Demonic: They play this completely straight as their motif. Whereas canon!Salamanders embody the Delightful Dragon trope, RH!Salamanders embody dragons as greedy, violent and domineering creatures of evil.
- Evil Laugh: A very callous and terrifying one.
- Evil Overlord: Unlike canon!Salamanders, these guys are cruel and tyrannical Super Soldiers who rule over their minions through strength and brutality.
- Greed: Most Salamanders hold the acquisition of treasures as their highest priority, this tendency comes from Vulkan. Who only felt at peace when he owned artifacts of great value as symbols or treasures.
- Humanoid Abomination: Dragon Warriors, being Warp-mutated Draconic Humanoids.
- Immortality Seeker: All of them, like their Primarch, seek to become undying immortals so they could rule forever over their treasures and slaves. You can't keep your stuff when you're dead, after all.
- Kick the Dog: Salamanders, when capturing the human planet, turn its population into mindless slaves via the Branding Ritual and force them to work in hellish conditions. Then, when the Imperium tries to take back the planet, Salamanders sabotage all the remaining infrastructure and escape, leaving countless slaves to die from starvation.
- Ambition Is Evil: The reason of his fall to Chaos. Vulkan wanted to get as much power as possible and be invincible.
- Faux Affably Evil: Vulkan acted like that before the Heresy.
- Hero Killer: He slew Konrad Curze and Mortarion.
- A God Am I: Vulkan wants to become the Chaos God of Greed and Tyranny, and it might be possible that the Black Dragon has already achieved this goal.
- It's All About Me: He's probably the biggest egoist among all Primarchs, and counts his personal gain and advancement as the most important thing in the universe.
- Mortality Phobia: One of Vulkans reasons for his goal of eventual godhood is a fear of eventual death, even as a Daemon prince. He has had this fear since the attempt on his life by John Gramaticus during the Heresy.
- My God, What Have I Done?: The only time he ever regretted anything was when he killed his own brother, Konrad Curze during the Dropsite Massacre. He genuinely thought that he was going to regenerate and get back up again like he was (and thus come around to his way of thinking), and was quietly horrified when Konrad didn't. He simply resolved to never do anything that he would regret.
- Raised by Wolves: Once he landed on Nocturne, he was adopted and raised by a Salamander. However, because Salamanders do not maintain any emotional connection to their young once these grow up and consider their adult offspring to be simply more competitions and threats, his "mother" attacked and killed him once he grew too old; this was largely responsible for a lot of his emotional issues.
- Red Baron: Known as "the Black Dragon" for his dark skin and his ruthless cruelty.
- Scary Black Man: He didn't get the nickname "the Black Dragon" without any proper reason.
- Start of Darkness: Vulkan's For Want of a Nail is when he was found not by the native Humans of Nocturne, but by a Nocturne Salamander, which adopted and raised him. While this might not sound like a bad thing on paper, Vulkan does not possess a Nocturne Salamander's natural instinct to get out of their parent's den when they mature to go their own way, after which their parents would instinctively treat them as a threat to them and their next children. The trauma that followed after Vulkan got mauled and burnt to death by his own adoptive beast-mother — and his resurrection afterwards — went a long way in turning him into a sociopathic, domineering conquering tyrant he is in the RH-verse instead of the compassionate, protective champion of Humanity he was in canon.
XIX — Raven Guard
- Dark Is Evil: They're the only legion to currently wear full black armor, and they are the most sinister among all the Legiones Astartes
- The Dreaded: The other traitor legions regard members of the Raven Guard with suspicion and mistrust, and even daemons treat them with some degree of caution.
- Evilutionary Biologist: Their apothecaries, who manage to disgust even Fabius Bile.
- Humanoid Abomination: All Chaos Space Marines from the Raven Guard are either living conduits of Warp energy (purebloods) or misshapen clones (Spawn Marines).
- Outside-Context Problem: The Unkind are from the warp, but their nature is different of the rest of the Daemons and they're only related to the Raven Guard.
- Send in the Clones: After entering the Emperor's laboratories on the Bucephalus, Corax started the practice of cloning to acquire recruits for the legion. While the original clones were created in clean and careful conditions, the Spawn Marines created during and after the Heresy are far from the originals in terms of quality.
- From Nobody to Nightmare: From the prisoner of tech-lords of Kiavahr to a Daemon Prince of Chaos Undivided.
- Go Mad from the Revelation: His travel to the center of the Eye of Terror destroyed whatever remained of Corax's sanity. He can also cause this on others with his mere presence.
- Invisibility: One of his innate psychic powers, like in canon.
- Kick the Son of a Bitch: Corax would later inflict an extremely cruel fate on the same tech-lords who tortured and experimented on him since childhood, by binding their souls to their bodies, destroying their brains, and torturing them until his sorcery could no longer resurrect them. While it may have been horrible if done to anyone else, the tech-lords deserved what came to them.
- Omnicidal Maniac: Corax wants to unite the Materium and the Immaterium and turn humans into perfect hybrids of flesh and Warp. Needless to say, his goal means destruction for anyone who doesn't agree with him.