Site News
Warning: This wiki contains spoilers. Read at your own risk!

Discord: If you would like, please join our Discord server!

New Twitter: We have a new Twitter account: @FEWikiOfficial!

Church of Seiros

From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.
Church of Seiros

FETH church of seiros emblem.png
Emblem of the Church of Seiros.


Garreg Mach Monastery

Group type

Religious order


To promote the teachings of Sothis and safeguard peace in Fódlan


Three Houses

Long ago, the divine Seiros received a revelation from the goddess. A gift, to help guide the lost. The goddess is always watching over Fódlan from her kingdom above. However, in ancient times, the goddess graced this world with her presence and offered salvation to the people here. She is the mother of all life, the arbiter of every soul.
— Rhea

The Church of Seiros (Japanese: セイロス聖教会 Seiros Holy Church) is a religious organization that holds power over the continent of Fódlan[1] in Fire Emblem: Three Houses. It is served by the Knights of Seiros.


FERK Athos.png

It has been requested that references(s) be placed in this page or section. Please submit references to help improve this page and talk on this page's talk page about what references are needed. Remove this when this has been fixed.

The Church was founded in year 85 of the Imperial calendar in the aftermath of the war between Saint Seiros and the Liberation King Nemesis. To help manage the affairs of the Church, it was split into four branches: the main Central Church, based in Garreg Mach Monastery, the Southern Church in Adrestia, the Western Church in Faerghus, and the Eastern Church in Leicester. The Church of Seiros served as Fódlan's primary religious institution throughout the next millennium, and also acted as peacekeepers in times of conflict; the Church is notably credited with negotiating the end of the War of the Eagle and Lion that resulted in the legitimization of Faerghus as an independent nation in exchange for the Church being declared the state religion. In approximately 1065, the Southern Church participated in a major insurrection against the Empire. The bishop of the Southern Church was exiled by the emperor, the Southern Church was disbanded, management of religious affairs in the Empire was transferred to House Varley, and relations between the Empire and the Church were permanently and fatally damaged.

By the year 1180, Seiros had become archbishop of the Church under the pseudonym Rhea. Throughout 1180, the Central Church came under attack by a conspiracy involving the Western Church, a cult known as "those who slither in the dark", and a masked individual calling themselves the Flame Emperor. The Knights of Seiros crushed the Western Church, purged the heretic apostates, and replaced them with new clergy loyal to the Central branch. At the end of 1180, the Flame Emperor was unmasked as newly crowned Adrestian emperor Edelgard von Hresvelg, who blamed the Church for propagating the Crest-based society that led to her siblings being killed in experiments that imbued her with the Crest of Flames. She formally declared war on the Church and won the opening battle at Garreg Mach. The outcome of the war would be determined by the actions of a mercenary named Byleth.

On non-Crimson Flower routes, where Byleth either taught the Blue Lions or Golden Deer, or taught the Black Eagles and sided with the Church, Rhea was captured by the Empire after the Battle of Garreg Mach, and the Knights of Seiros scattered to the four winds to find her and the missing Byleth. In 1185, Byleth awoke from a five year coma and returned to Garreg Mach Monastery. Once word of their return reached the remnants of the Church, Rhea's former second-in-command Seteth rallied them, returned to the monastery, and joined Byleth to help form a Resistance (Silver Snow)/Kingdom (Azure Moon)/Alliance (Verdant Wind) Army. The Church lent military support to Byleth throughout the conflict with the Empire, and ultimately helped them emerge victorious. Afterwards, the Church helped to restore order to Fódlan and reformed the policies that led to Edelgard declaring war in the first place. On the Silver Snow route, if Byleth married Rhea, she returned to her role as archbishop after recovering from her imprisonment and personally spearheaded reform efforts. On the Azure Moon route, Rhea named Byleth her successor as archbishop before retiring to Zanado.

On the Crimson Flower route, where Byleth taught the Black Eagles and sided with Edelgard, Rhea and the Church escaped to Faerghus after the Battle of Garreg Mach, and Prince Dimitri Alexandre Blaiddyd ascended the throne, granted them asylum, and forged a military alliance against the Empire. The Church spent the next five years locked in a bitter stalemate with the Empire, until Byleth's return decisively tipped the war in the Empire's favor. After the Empire conquered Leicester, the Knights of Seiros launched a counterattack in an attempt to retake Garreg Mach Monastery, but were repelled. The Empire invaded the Kingdom, slew Dimitri, and cornered Rhea in the capital city, Fhirdiad. Rhea set Fhirdiad on fire in a last attempt to wipe out Imperial forces, but Byleth led the Empire in battle and slew her, bringing an end to Church dominance over Fódlan. The Church was then reformed under the Empire.


FETH Rhea.png FETH Seteth.png FETH Flayn.png FETH Tomas.png FETH Cyril.png FETH Aelfric.png FETH Byleth f.png
Rhea Seteth Flayn Tomas Cyril Aelfric Byleth White CloudsSilver SnowAzure MoonVerdant Wind

Etymology and other languages

Names, etymology and in other regions
Language Name Definition, etymology and notes

Church of Seiros

Seiros may be derived from the ancient Greek σείριος,[2] which means scorching or destructive, and is the origin of the name of the star Sirius (which is a latinization of the Ancient Greek Σείριος). In-universe, Seiros is the name of a prominent figure in the faith's doctrine.



Seiros Holy Church


Iglesia de Seiros

Church of Seiros


Église de Seiros

Church of Seiros


Kirche der Seiros

Church of Seiros


Chiesa di Seiros

Church of Seiros


세이로스 성교회

Seiros Church

Simplified Chinese


Seiros Holy Church

Traditional Chinese


Seiros Holy Church



  1. "The game takes place on Fódlan, where the Church of Seiros exercises great power over the land and its people."Fire Emblem: Three Houses revealed for Nintendo Switch,, Published: June 12 2018, Retrieved: June 12 2018
  2. wiktionary:Σείριος#Ancient Greek
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 Abysskeeper*Duke AegirDuke GerthFlecheGatekeeperGlennHolstIonius IXJeraltJudithLadislavaLambertLord ArundelMonicaNaderPatriciaRandolphRheaRodrigueRufusSeirosSitriSothisTomasTiana
Bosses AcheronAelfric*AloisBaron DominicBaron Ochs*BiasBlaiddydCasparCatherineCharonChilonClaudeCorneliaDaphnelDedueDeath KnightDimitriDominicEdelgardFelixFerdinandFlame EmperorFlaynFraldariusGautierGloucesterGonerilGwendalHubertIngridThe Immaculate OneThe ImmovableJudithKostasKronyaLadislavaLamineLinhardtLonatoLord ArundelLorenzMercedesMetodeyMiklanMysonNaderNemesisOdessePallardóPittacusRandolphRheaRieganRodrigueSetethShamirSolonSylvainThalesWandering 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
White Clouds
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 Struggle Black 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 Paralogues Part I A Cursed Relic*An Ocean ViewBlack Market Scheme*Death TollDividing the World Black Eagles, if Byleth sides against EdelgardBlue LionsGolden DeerFalling Short of HeavenThe ForgottenLand of the Golden DeerOil and WaterRumored NuptialsThe Secret Merchant* Blue LionsGolden DeerSword and Shield of SeirosTales of the Red CanyonTrue ChivalryWar for the Weak Blue Lions
Part II Darkness Beneath the Earth Crimson FlowerDividing the World Silver SnowAzure MoonVerdant WindEternal Guardian Silver SnowAzure MoonVerdant WindThe Face Beneath Silver SnowAzure MoonVerdant WindForeign Land and SkyForgotten HeroInsurmountable Crimson FlowerLegend of the LakeRetribution Silver SnowAzure MoonVerdant WindThe Secret Merchant* Crimson FlowerThe Silver Maiden Azure MoonThe Sleeping Sand Legend Verdant WindWeathervanes of Fódlan Azure Moon
Cindered Shadows
(DLC side story)
Cindered Shadows
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 Fódlan (AbyssAdrestiaFaerghusGarreg Mach MonasteryLeicester) • AlmyraBrigidDagdaSreng
Groups, objects and concepts 10 ElitesAshen WolvesBlack EaglesBlue LionsChildren of the GoddessChurch of Seiros (Knights of Seiros) • Crests (Crest Stone) • Divine PulseGolden DeerHeroes' RelicsInsurrection of the SevenMonstersThose who slither in the darkTragedy of DuscurWar of Heroes
Related topics Music LibraryName chartPre-release informationUnused content