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(Redirected from Seiros)

FETH Rhea 02.png
Artwork of Rhea from Three Houses.







11th of the Guardian Moon (January 11)


Sothis (mother)

Starting class


Voiced by
We cannot ignore those who harbor ill will towards the church, especially if they are frequenting Garreg Mach.
— Rhea, to Seteth.

Rhea (pronounced /'ɹeɪə/[key]; Japanese: レア Rhea) is a character appearing in Fire Emblem: Three Houses. She is the archbishop of the Church of Seiros, and has served in this role since Jeralt's days as a knight. Her true identity is Seiros (pronounced /'sɛɹoʊs/[key]; Japanese: セイロス Seiros), the slayer of Nemesis in Imperial Year 91, revered as a saint in the Church of Seiros.


Rhea was born as the child of Sothis from her blood, among others, and together they lived at Zanado. The King of Liberation, Nemesis, who had stolen her mother's remains and made the Sword of the Creator with them, invaded Zanado with his army and killed all of the goddess' children, save Rhea. Thirsty for revenge, she took up the name Seiros, gathered soldiers from Fódlan, and led an attack against Nemesis and the 10 Elites. During her conflict with Nemesis, she helped Wilhelm Paul Hresvelg found the Adrestian Empire. At the Tailtean Plains, she killed Nemesis. Afterwards, she founded the Church of Seiros. Her draconic form ultimately came to be known as a legendary figure called the Immaculate One. Over the course of the next millennium, Seiros attempted to create a vessel capable of hosting Sothis' consciousness so she could resurrect her by planting Sothis' Crest Stone within their bodies, but all of her efforts ended in failure. By the Imperial Year 1159, she had become the Archbishop of the Church of Seiros under the name Rhea. Her twelfth failed vessel Sitri fell in love with the captain of the Knights of Seiros, Jeralt, and had a child named Byleth. However, the child was stillborn, and Rhea transferred Sothis' Crest Stone to Byleth and saved them at the cost of Sitri's life. Byleth was unnaturally silent and had no heartbeat, leading the terrified Jeralt to fake the child's death and flee Garreg Mach Monastery.

In 1180, Jeralt and Byleth are caught up in an attack on Officer's Academy students Edelgard, Dimitri, and Claude, leading the amnesiac Sothis to awaken within Byleth's soul. Jeralt returns to Garreg Mach, where Rhea reinstates Jeralt as a Knight of Seiros and gives Byleth a teaching position at the Academy in the hopes that Sothis can be resurrected through Byleth. Over the course of the next year, Rhea oversees the education of the students of the Officer's Academy and assigns missions to Byleth and the other professors. Eventually, Jeralt is murdered by an assassin and Byleth is drawn into a trap in an attempt to avenge him. Byleth fuses with Sothis and gains all of her powers, leading Rhea to believe her long struggle has finally succeeded. She takes them to the Holy Tomb beneath the monastery in the hopes of having them commune with Sothis, but Edelgard attacks the tomb with her soldiers. Byleth defeats her, but Edelgard escapes, accuses the Church of being corrupt and stagnating humanity, and declares war on the Church. Byleth can either remain loyal to the Church or defect to the Empire; in either case, Edelgard attacks Garreg Mach. Rhea leads Church forces in battle, but is defeated.

On all routes other than Crimson Flower, where Byleth remains loyal to the Church, Rhea is captured by Imperial forces after the battle and imprisoned in the Imperial capital Enbarr for the next five years. After Byleth awakens from a coma, rallies an army, and kills Edelgard, they rescue Rhea. On the Azure Moon route, she passes the title of Archbishop on to Byleth and peacefully retires to Zanado. On the Silver Snow and Verdant Wind routes, Edelgard's vassal Hubert reveals the existence of the true threat to Fódlan, a cult known as "those who slither in the dark", and directs Byleth to their stronghold at Shambhala. Rhea recounts some of her personal history to Byleth and accompanies them to Shambhala, where she transforms into the Immaculate One in order to protect Byleth from "those who slither in the dark"'s javelins of light. Severely injured, Rhea is returned to Garreg Mach Monastery. On the Silver Snow route, she recounts her experiments to resurrect Sothis, but suddenly suffers from draconic degeneration, transforms into the Immaculate One, and goes berserk. Byleth is forced to defeat her; if she was not S-supported with Byleth, she dies in their arms, while if she was S-supported, she barely survives and manages to make a full recovery. On the Verdant Wind route, when "those who slither in the dark" resurrect Nemesis in a final attack on Fódlan, Rhea recounts the rest of her history to Byleth. She is not seen afterwards, and presumably succumbs to her wounds and dies.

On the Crimson Flower route, where Byleth defects to the Empire, their betrayal causes Rhea to suffer a total psychotic breakdown. After the Battle of Garreg Mach, Rhea retreats to the Faerghus capital of Fhirdiad, and Dimitri ascends the throne and allies with her. She spends the next five years in a stalemate with the Empire, until Byleth awakens from their coma and tips the war in Adrestia's favor. Rhea leads Church forces in an attack on the monastery, but despite killing Adrestian commanders Randolph and Ladislava, is defeated and forced to retreat. Retaking the name Seiros, she and Dimitri confront the Imperial army at the Tailtean Plains, but Dimitri is killed and Seiros is again driven off. She returns to Fhirdiad, takes control of the Kingdom, orders Fhirdiad burned to the ground, and transforms into the Immaculate One. Seiros faces Edelgard and Byleth in a climatic final battle, but is finally slain, bringing an end to Church dominance over Fódlan.

Fire Emblem: Three Houses


Rhea is an NPC for one paralogue and Chapter 12 on all routes other than Crimson Flower. She is the primary antagonist and a recurring boss on the Crimson Flower route and the final boss of both Crimson Flower and Silver Snow.


Neutral - Chapter 12

Normal Hard Maddening

Enemy - Black Eagles Chapter 12

Normal Hard Maddening

Neutral - Falling Short of Heaven

Normal/Hard Maddening

Enemy - Silver Snow Chapter 21

First form

Normal Hard Maddening

Second form

Normal Hard Maddening

Enemy - Crimson Flower Chapter 17

Normal Hard Maddening

Enemy - Crimson Flower Chapter 18

Normal Hard Maddening

Personality and character

This section has been marked as a stub. Please help improve the page by adding information.

Rhea connects with people like a calm, affectionate mother, yet dispenses strict judgement on opponents of the Church.


Main article: Rhea/Supports


Byleth, Wandering Flame & Rhea (Silver Snow)
After finally saving both Fódlan and Rhea from crisis, Byleth ascended the throne as the first leader of the United Kingdom of Fódlan. From his/her temporary residence at Garreg Mach Monastery, he endeavored to restore and develop Fódlan. Having narrowly escaped death, Rhea took time to recover her strength before returning to her role as archbishop. Upon her return, she applied herself to rehabilitating the church and helping those who had suffered because of the war. Thereafter, the two worked closely to forge new policies and achieve progress for Fódlan. The pair's collective work came to be thought of as nothing short of miraculous.


Battle quotes

So you have sullied yourself by joining the rebels? I hope you came prepared to breathe your last.
— Rhea, as a boss in Black Eagles Chapter 12.
You... How dare you betray me... You worthless piece of garbage... I will punish you myself!
— Rhea, as a boss fighting Byleth in Black Eagles Chapter 12.
Rhea: No matter your reasons, I cannot permit you to go on living any longer!
Edelgard: The feeling is mutual. I must put a stop to your reign of tyranny!
Rhea: You must know what a fool you are. The greatest of sins is to make an enemy of the goddess herself!
Edelgard: I have only made an enemy of the church, not of the faith.

— Rhea, as a boss fighting Edelgard in Black Eagles Chapter 12.
You are all damned, with no hope of salvation. For the sin of insurgency, you shall be consigned to hell!
— Rhea, as an enemy in Crimson Flower Chapter 17.
I once walked this world as Seiros, the warrior... and defeated the Fell King Nemesis. Now, here I stand, facing one who wields the same sword as he... The fate you have chosen is also the same as his... To die in torment upon my sword, as the very lifeblood you have forsaken spills onto the earth!
— Rhea, as an enemy fighting Byleth in Crimson Flower Chapter 17.
Rhea: An ancestor of the Hresvelgs, who became Adrestia's first emperor... He saved me. Supported me. Gave his all to the cause of defeating Nemesis. That I should find myself here at Tailtean, striking down his scion...
Edelgard: I don't advise presumptions, Rhea. I will not die by your hand.

— Rhea, as an enemy fighting Edelgard in Crimson Flower Chapter 17.
I see that the years have not cured humanity of its folly... You still wish to hurt and betray my mother and myself!
— The Immaculate One, as an enemy in Crimson Flower Chapter 18.
Give her back... Give back my mother! Gaaaaaah!
— The Immaculate One, as an enemy fighting Byleth in Crimson Flower Chapter 18.
Edelgard: So it's true. You don't value human life at all. Isn't that right, Immaculate One?
The Immaculate One: Nonsense! Fools who do not accept their own sins are undeserving of salvation! You humans are the ones who betrayed! You betrayed me, and you betrayed my mother!
Edelgard: I did not betray you or her. I never believed in you from the beginning.

— The Immaculate One, as an enemy fighting Edelgard in Crimson Flower Chapter 18.
— The Immaculate One's battle quote in Chapter 21 of Silver Snow.

Critical quotes

In the name of the goddess.
— Rhea
You have been judged.
— Rhea
Eternity awaits!
— Rhea
Know your place.
— Rhea

Death/retreat quotes

You shall not be forgiven!
— Rhea's retreat quote as an NPC in Part I.
— Rhea's retreat quote as an enemy in Black Eagles Chapter 12.
— The Immaculate One's defeat quote in Chapter 21 of Silver Snow.
Rhea: How can this be? I lost to that thief?! Unacceptable!
Knight of Seiros: Watch out, Lady Rhea! Please retreat!
Rhea: Gyhh!
Dimitri: The Church of Seiros has fallen back, but we have no such luxury. Everyone, fight for your lives! Victory to Faerghus!

— Rhea's defeat quote in Crimson Flower Chapter 17.

Other appearances

Super Smash Bros. Ultimate

Rhea makes a cameo appearance in Super Smash Bros. Ultimate at Garreg Mach Monastery, alongside Seteth and Flayn when the stage changes to the cathedral. Rhea additionally appears as an Ace neutral-type spirit using her artwork from Fire Emblem: Three Houses. When equipped to an AI character, Rhea grants the giant status. When equipped to a player character, she grants increased magic attack power.

150x200px #664
Fire Emblem Series
Type: SSBU spirit type icon neutral.png Neutral
Rank: ★★★
Number of support spirit slots: ⬣⬣⬣
Trait: Magic Attack ↑

Slightly increases the power of magic attacks.

Level 1 stats:

Attack: 1566
Defense: 1205
Power: 2937

Level 99 stats:

Attack: 4698
Defense: 3617
Power: 8813

Fire Emblem Cipher

Rhea is currently featured on three cards in Fire Emblem Cipher: one as Rhea, one as The Immaculate One, and one as Seiros.

The below cards' epithets are still in raw, untranslated Japanese; these need translation.
Fire Emblem Cipher data for Rhea, The Immaculate One, and Seiros
TCGCipher B19-045HN.png セイロス聖教会の大司教, Rhea



"The goddess is always watching over Fódlan from her kingdom above."
Attack: 60 Support: 20 Range: 1-2 Deploy Cost: 5
Class: Archbishop Tier: Advanced Class Change Cost: 4
"I ask that you guide them.": [Activate] [Tap this unit] [Flip one bond card] Choose 1 Fódlan card with a deployment cost of 4 or lower from your Retreat Area, and deploy it. Once you do, add this unit to your deck, and then shuffle your deck.
Crest Power "May your souls return to the goddess's side.": [Hand] [Activate] Your opponent adds all cards in their Retreat Area to their deck. Then, they shuffle their deck. ([Hand] is only usable while this card is in your hand.)
Card #B19-045HNArtist: Ayaka Kato
TCGCipher B19-048HN.png 神祖に生み出されし眷属, The Immaculate One




"If we do nothing, Fódlan will be destroyed by a rampaging Immaculate One and these "children" of hers."
Attack: 80 Support: 0 Range: 1-3 Deploy Cost: 7
Class: The Immaculate One Tier: Base Class Change Cost: --
Hoarfrost of Ruin: [Activate] [Tap this unit] Destroy all enemies and allies, other than this unit and lords.
Rampage of Divine Power: [Trigger] At the end of your turn, choose 1 of your orbs, and destroy it.
Card #B19-048HNArtist: Yoneko
TCGCipher B19-102HR.png 神詞を賜りし聖者, Seiros



"Tell me, Nemesis. Do you recall the Red Canyon? You took... everything that I loved!"
Attack: 80 Support: 20 Range: 1 Deploy Cost: 6
Class: Saint Tier: Advanced Class Change Cost: 5
Sin-Severing Blade: [Trigger] When you deploy this unit, you may choose 1 non-lord enemy, and destroy them.
Revelation from the Goddess: [Activate] [Once per turn] [Flip three bond cards] If you have 4 or fewer orbs, add the topmost card of your deck to your orbs.
Card #B19-102HRArtist: Homare
Some card information translation provided by Serenes Forest.
For more detailed strategic information on these cards, see their TCG wiki article on Rhea as well as Immaculate_One and Seiros.


Seiros shown without blood coating the sword and her hands.
  • The version of the Seiros versus Nemesis cutscene shown at E3 2018 omitted blood from the scene.
  • Counting her four health bars in total, Rhea has the highest HP total of any single enemy unit in the main Fire Emblem series, with 640 as the final boss of Silver Snow on Maddening mode.
    • As the final boss of Silver Snow on Maddening, Rhea's second form's final health bar has the highest raw stat total of any unit in the Fire Emblem series if movement is not included, with 525. If all four health bars are counted together, Rhea reaches a grand total of 966.
  • Rhea is the only non-playable character in the Fire Emblem series to have C, B, and A support conversations with a playable character.
    • Additionally, Rhea is the only character with whom Byleth can obtain an A support before Part II (not counting the ability to buy back support levels in New Game +).

Etymology and other languages


Names, etymology and in other regions
Language Name Definition, etymology and notes
English Rhea Rhea was the name of a Greek titan that was the daughter of the goddess Gaia and the god Uranus. There is also a moon of Saturn named for Rhea.
Japanese レア Rhea
Spanish Rhea As above.
French Rhea As above.
German Rhea As above.
Italian Rhea Above.
Korean 레아 Rhea
Simplified Chinese 蕾雅 Rhea
Traditional Chinese 蕾雅 Rhea


Names, etymology and in other regions
Language Name Definition, etymology and notes
English Seiros Seiros may be derived from the Ancient Greek σείριος seírios,[3] 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 Seírios).
Japanese セイロス Seiros, as above.
Spanish Seiros As above.
French Seiros As above.
German Seiros As above.
Italian Seiros As above.
Korean 세이로스 Seiros
Simplified Chinese 赛罗司 Seiros
Traditional Chinese 賽羅司 Seiros


External links


Project Characters.png This article is part of Project Characters, a project focused in writing articles for every character present in the Fire Emblem series.
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 NuptialsThe Secret Merchant*Sword 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