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Those who slither in the dark

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Those who slither in the dark

TWSITD Banner.png
"Those who slither in the dark"/Agartha's banner





Shambhala, an underground city near House Goneril territory

Group type

Remnants of an ancient civilization


Those who slither in the dark are a hidden organization operating throughout Fódlan. They are the remnants of an ancient civilization known as Agartha.


Agartha was an ancient civilization who Sothis and the Children of the Goddess, also known as the Nabateans, shared their knowledge with, which allowed them to create highly advanced technology and architecture. Over time, the Agarthans started to fight against themselves and bringing destruction across Fódlan, to the point they eventually waged war against Sothis and her kin in an attempt to impose their supremacy, a battle they lost and purged most of their civilization. This forced the remaining survivors to hide themselves alongside their technology under the surface, from where they created their current base of operations, Shambhala, and prepared for their revenge against Sothis and the children of the goddess for having caused their destruction and had taken from them what they believed was rightfully theirs.

It is speculated by Rhea and Seteth that sometime after this, they allied themselves with Nemesis, whom they leaded to the Holy Tomb where Sothis rested and had him harvest her remains in order for them to create the Sword of the Creator, which he later used in Zanado to slaughter more Nabateans in order to create more weapons for his allies. After his defeat, "those who slither in the dark" recovered his corpse and hid underground once more.

Years later, they attemped to destroy Garreg Mach Monastery with a "javelin of light". Unbeknownst to them, the Holy Tomb had a protection spell put by Sothis which redirected their weapon into a village named Ailell, which ended up consumed in flames. This created what it is known as the Valley of Torment, a place the commonfolk believe it was born as a product of the goddess punishing the sinners who resided in that village.

By the time of the game's story, the Agarthan descendants made their way into Fódlan by replacing and impersonating key people with their own agents, like Cornelia, Tomas and Arundel. This led to the group capitalizing of both the Tragedy of Duscur and the Insurrection of the Seven for the purpose of providing the means and resources for the experiments required to infuse a vessel of their choice the Crest of Flames, which would be the ultimate weapon against the Church of Seiros and, by extension, the remaining Children of the Goddess. Years later, the only surviving imperial heir and their greatest success, Edelgard, allied with the group with the intention of using their resources and troops to take down the Church of Seiros and take over Fódlan for her own separate reasons, while also planning to dispose them once she had archieved her goals in revenge for destroying the lives of her family and her siblings as well for their involvement in the Tragedy of Duscur.

During this alliance, her retainer Hubert started researching the group in order to facilitate their destruction for his liege in the future, and it was in the course of this process that he came up with the nickname the group is mostly identified with during the story: "those who slither in the dark".


Character Description Appears in
Small portrait thales fe16.png
The leader of "those who slither in the dark". Three Houses
Small portrait solon fe16.png
High ranking member of "those who slither in the dark". Three Houses
Small portrait kronya fe16.png
High ranking member of "those who slither in the dark". Three Houses
Small portrait cornelia fe16.png
High ranking member of "those who slither in the dark". Three Houses
Generic small portrait warlock 01 fe16.png
High ranking member of "those who slither in the dark". Three Houses
Generic small portrait gremory 02 fe16.png
High ranking member in change of keeping the Viskam in Shambhala operational. Three Houses
Generic small portrait gremory 02 fe16.png
High ranking member in change of creating Titanus in Shambhala. Three Houses
Generic small portrait great knight fe16.png
High ranking member in change of guarding Shambhala's center room. Three Houses
Generic small portrait dark bishop fe16.png
High ranking member who provides reinforcements to Nemesis in the Verdant Wind route. Three Houses


Etymology and other languages

Names, etymology and in other regions
Language Name Definition, etymology and notes
English • "Those who slither in the dark"
• Agarthans
Agartha is a legendary kingdom said to have been located in the Earth's core.



Fire Emblem: Three Houses
Playable characters Black Eagles BernadettaCasparDorotheaEdelgardFerdinandHubertLinhardtPetra
Blue Lions AnnetteAsheDedueDimitriFelixIngridMercedesSylvain
Golden Deer ClaudeHildaIgnatzLeonieLorenzLysitheaMarianneRaphael
Other AloisAnna*BylethCatherineCyrilFlaynGilbertHannemanJeritza*ManuelaSetethShamir
Ashen Wolves* BalthusConstanceHapiYuri
Non-playable characters Duke AegirFlecheIonius IXJeraltJudithLadislavaLambertLord ArundelMonicaNaderRandolphRheaRodrigueSeirosSothisTomas
Bosses AcheronAelfric*BiasBlaiddydCatherineCharonChilonClaudeCorneliaDaphnelDeath KnightDimitriDominicEdelgardFlame EmperorFerdinandFraldariusGautierGloucesterGonerilGwendalHubertThe Immaculate OneThe ImmovableJudithKostasKronyaLadislavaLamineLonatoLord ArundelLorenzMetodeyMiklanMysonNaderNemesisOdessePallardóPittacusRandolphRheaRieganRodrigueSolonThalesWandering BeastThe Wind Caller
Personal weapons and regalia Aegis ShieldAreadbharAsclepiusAthameAxe of UkonvasaraAymrBlutgangCaduceus StaffCirce StaffCrusherFailnaughtFetters of DromiFreikugelThe InexhaustibleLance of RuinLúinOchain ShieldRafail GemScythe of SarielSeiros ShieldSpear of AssalSword of BegaltaSword of MoraltaSword of SeirosSword of the CreatorTathlum BowThunderbrandThyrsusVajra-Mushti
Chapters Part I Prologue: An Inevitable Encounter • 1: Three Houses • 2: Familiar Scenery • 3: Mutiny in the Mist • 4: The Goddess's Rite of Rebirth • 5: Tower of Black Winds • 6: Rumors of a Reaper • 7: Field of the Eagle and Lion • 8: The Flame in the Darkness • 9: The Cause of Sorrow • 10: Where the Goddess Dwells • 11: Throne of Knowledge • 12: To War Black Eagles, if Byleth sides against EdelgardBlue LionsGolden Deer / Outset of a Power StruggleBlack Eagles, if Byleth sides with Edelgard
Part II Silver Snow
Silver Snow
13: Reunion at Dawn • 14: A King Without a Kingdom • 15: Valley of Torment • 16: The Rose-Colored River • 17: The Impregnable Fortress • 18: The Chaos of War • 19: Conclusion of the Crossing Roads • 20: The City Without Light • 21: Following a Dream
Azure Moon
Azure Moon
13: Reunion at Dawn • 14: The Delusional Prince • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The King's Triumphant Return • 19: The Golden Deer's Plea • 20: The Impregnable Fortress • 21: Our Chosen Paths • 22: Oath of the Dagger
Verdant Wind
Verdant Wind
13: Reunion at Dawn • 14: The Alliance Leader's Ambitions • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The Golden Scheme • 19: The Chaos of War • 20: Conclusion of the Crossing Roads • 21: The City Without Light • 22: Fódlan's New Dawn
Crimson Flower
Crimson Flower
13: Beyond Escape • 14: The Master Tactician • 15: Tempest of Swords and Shields • 16: Lady of Deceit • 17: Field of Revenge • 18: To the End of a Dream
Paralogues Part I A Cursed Relic*An Ocean ViewBlack Market Scheme*Death TollDividing the WorldFalling Short of HeavenThe ForgottenLand of the Golden DeerOil and WaterRumored NuptialsSword and Shield of SeirosTales of the Red CanyonTrue ChivalryWar for the Weak
Part II Darkness Beneath the EarthEternal GuardianThe Face BeneathForeign Land and SkyForgotten HeroInsurmountableLegend of the LakeRetributionThe Secret Merchant*The Silver MaidenThe Sleeping Sand LegendWeathervanes of Fódlan
Cindered Shadows
(DLC side story)
1: The Fourth House • 2: What Lies Beneath • 3: The Rite of Rising • 4: Danger in the Dark • 5: Betrayal • 6: Return to Me • 7: Wolf Pack
Locations FódlanAbyssAdrestiaFaerghusGarreg Mach MonasteryLeicesterAlmyraBrigidDagdaSreng
Groups, objects and concepts 10 ElitesAshen WolvesBlack EaglesBlue LionsChurch of Seiros (Knights of Seiros) • Crests (Crest Stone) • Divine PulseGolden DeerHeroes' RelicsMonstersThose who slither in the darkTragedy of DuscurWar of Heroes
Related topics Music LibraryName chartPre-release informationUnused content