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“All I ask is that you guide these open minds with virtue, care, and sincerity.”
—Rhea's instruction to Byleth upon choosing a House.

Rhea is a character in Fire Emblem: Three Houses. She is the archbishop and supreme leader of the Church of Seiros. At Garreg Mach Monastery, Rhea can help Byleth increase their rank in Reason, Faith, Brawl, and Swords. She possesses a major Crest of Seiros.

ProfileEdit

Rhea is the Archbishop of the Church of Seiros and leader of the Knights of Seiros as a result. She previously was Jeralt's superior when he was Captain of the Knights of Seiros until he left her employ in Wyvern Moon 1159. She serves as a key figure for the Officers Academy as well, assigning missions to the three houses each month.


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Rhea is actually one of the Nabateans, the original children of the progenitor god Sothis. She is also Seiros herself, the saint who founded the Church of Seiros, defeated Nemesis, and helped found the Adrestian Empire. Seiros was a name she chose when carrying out these tasks, rather than her real name.

In the ancient past, the Children of the Goddess were born of Sothis's blood after the progenitor god arrived in Fódlan. She and the other children coexisted with the native Agarthans and shared their knowledge with them, leading their shared civilization to become technologically advanced and prosper. The Agarthans enacted various wars among themselves, eventually thinking of themselves as gods and turning on Sothis to kill her and the other Nabateans. Eventually, Sothis and the Nabateans defeated the Agarthans, but the war devastated Fódlan, and left most of the humans dead. However, remnants of the Agarthans fled into hiding underground, leading them to become Those Who Slither in the Dark.

Centuries or perhaps even a millennia later (it took a very long time for Sothis to restore Fódlan), Those Who Slither in the Dark convinced Nemesis, a bandit, to invade the Holy Tomb, where Sothis was sleeping after exhausting herself healing the land from the by-then ancient war, in order to steal her body. From Sothis's body, Those Who Slither in the Dark supplied Nemesis with her Crest of Flames and the Sword of the Creator. Armed with the relic, Nemesis returned to Zanado to massacre the Nabateans living there to make Heroes' Relics and Crests from their bodies. Rhea was the only survivor of the massacre and was left one of the few surviving Nabateans.

Desperate for revenge, Rhea, now calling herself Seiros, wandered the lands looking for allies to oppose Nemesis and his forces. She allied with her fellow survivors (whose human forms came to be known as the Four Saints) and Wilhelm I, to whom she granted her Crest, to oppose Nemesis in the War of Heroes, eventually killing Nemesis in battle at the Tailtean Plains and leading to the creation of the Adrestian Empire and the extended influence of the Church of Seiros with her as its head. The church rewrote history, hiding the existence of the Children of the Goddess, Agarthans, and the true origin of Crests and Relics, and revising the origins and allegiances of Nemesis and his Crest-wielding allies, the Ten Elites. Seiros did this in the hope of maintaining peace and tried to guide Fódlan as her mother would, but she never saw herself as adequate for the role.

Still awash with grief at the death of Sothis, Seiros secretly devoted herself to experimenting on implanting her mother's crest stone into created bodies in an attempt to revive her. Her twelfth creation, Sitri, also a failure, had fallen in love with a man named Jeralt, the captain of her Knights of Seiros, and one of the persons whom Seiros, now going under the name Rhea, had transfused her blood into after he took a near-fatal blow for her. This resulted in him inheriting a Major Crest of Seiros.

Sitri and Jeralt eventually sired a child; however, upon its birth, both Sitri and the child were feebly weak and near death. As both were destined to die, the mother pleaded Rhea to implant her Crest of Flames into her child. Acquiescing to Sitri's dying wish, Rhea implanted the Crest Stone into the child named Byleth, reviving them, at the cost of Sitri's life. Jeralt grew suspicious of Rhea due to the circumstances of his wife's death and Byleth's condition, who had a pulse but no heartbeat. Having lost his faith in her (questioning if Sitri really died in childbirth) and fearful of what Rhea might be planning, he used a fire to fake Byleth's death. With the loss of his wife and child, Jeralt left the order of the Knights without a word, secretly smuggling Byleth with him. It is unclear if Rhea believed in Jeralt's ruse at the time of his disappearance, but she is implied to figure it out at least as soon as she sees Byleth as an adult (and after Jeralt's death reveals to Byleth she knows what Jeralt did and at least part of why he did it).

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Academy PhaseEdit

Years later in 1180, when Jeralt returned to Rhea at Garreg Mach Monastery after saving Edelgard, Dimitri, and Claude, Rhea asks for his child Byleth to be a new professor at the monastery.


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Rhea's true motive for this move was to keep an eye on the new professor in her hope that Byleth would be able to eventually merge with Sothis in both mind and body, in effect reviving the progenitor god and enabling Sothis to guide Fódlan once more. After Byleth's power fuses with that of Sothis, Rhea brings Byleth to the Holy Tomb, hoping to complete the transformation (namely to add Sothis' consciousness to Byleth's). However, her plans are shattered when Sothis does not revive and the tomb is invaded by the Flame Emperor and Adrestian Empire forces.

The Imperial Army begins looting the tombs, prompting Rhea to order Byleth and their students to defend them from the thieves. Upon discovering that the Flame Emperor is actually Edelgard, Rhea orders Byleth to kill them, seeing her as a threat to Fódlan.

Depending on the house chosen, Rhea's involvement in the story drastically changes.

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Azure Moon/Verdant Wind/Silver SnowEdit

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In all routes but the Black Eagles, Byleth by default allies with the Church of Seiros and opposes Edelgard and the Adrestian Empire. If the Black Eagles were taught, Byleth still sides with Rhea unless certain supports and events with Edelgard were completed, in which case they may choose to protect Edelgard instead.

If Byleth sides with Rhea, Rhea is grateful for Byleth's loyalty and requests their help in the initial defense of the Monastery against the Adrestian Empire's invasion. Despite the failure of Sothis being revived in the way she had expected, she still believes Byleth is in a sense Sothis, and tells them that if anything happens to her in the coming battle that she is entrusting the future of Fódlan to them. She also asks Seteth and Flayn to help Byleth and in effect also help Sothis. Although they are successful in repelling the initial attack, an even larger army commanded by Lord Arundel arrives. Rhea orders Byleth to remain behind as she transforms into the Immaculate One, using her magic to clear the infantry, but soon three Demonic Beasts appear and overwhelm her with coordinated attacks.

Seeing Rhea in danger prompts Byleth to come and attempt to assist, much to Rhea's surprise as she ordered them to stay behind. Together they fight off the beasts, however, Thales then appears and launches a magic shockwave that sends Byleth careening into the ravine below, and Rhea roars mournfully as she is restrained by a remaining beast, believing Byleth to have been killed.

In all these routes Rhea is captured alive and kept confined in a weakened, unhealthy state in Enbarr. In the DLC it is revealed Edelgard keeps her alive in the hopes of using Rhea as a weapon against the Agarthans after the war to unite/conquer Fodlan is over.

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Crimson FlowerEdit

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Byleth, desiring to protect Edelgard after learning about her past, defies her order to execute Edelgard, much to her outrage. Proclaiming them to be a taint upon the Holy Tomb and refusing to let her enemies use Sothis' power, she transforms into the Immaculate One, but Byleth and Edelgard are able to escape with Hubert's assistance.

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Cindered ShadowsEdit

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As the party explores Abyss, Rhea reveals that she knows of the Chalice of Beginnings and discloses Sitri's dying wish to give Byleth her heart, but does not disclose that she herself as Seiros used it for the Rite of Rising or that Sitri was a creation of hers.

It is also revealed that Rhea had put Yuri in Abyss in order to keep an eye on Aelfric, who had been acting strange in recent years. This was due to Rhea's inability to bury Sitri, instead having planned a fake burial, moving her body into the Abyss, who Aelfric discovered five years after founding the Ashen Wolves. Upon learning that Aelfric intended to use the Chalice of Beginnings and the blood of the Four Apostles to revive Sitri, Rhea and the others are able to locate Aelfric due to Yuri's assistance. She pleads with him to stop, but her pleas are unheard as Aelfric proceeds with the interrupted ritual, transforming into an Umbral Beast in the process. Rhea then orders Byleth and the others to take the Umbral Beast down before it could cause further damage.

Once the Umbral Beast is dispatched of, Rhea apologizes to the Ashen Wolves, as they had lost their true purpose, deciding to dissolve it.

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War PhaseEdit

Azure MoonEdit

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In the aftermath of the Fall of Garreg Mach Monastery, Rhea is captured by the Adrestian Empire, forcing the Knights of Seiros to join Byleth's forces to rescue her. After Edelgard's death, Rhea is found alive but severely weakened. She steps down to live in seclusion in Zanado while Byleth takes over her role as Archbishop of the Church of Seiros.

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Verdant WindEdit

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When the Alliance defeats Edelgard and takes Enbarr, Rhea is found alive but seriously weakened. Claude is full of questions and urges Rhea angrily to unveil whatever secrets she has been hiding, but Rhea does not give all the answers immediately.

Rhea then accompanies Byleth and Claude as they travel to Shambhala and defeat Thales, the leader of Those Who Slither in the Dark. However, Rhea is gravely injured attempting to shield Byleth's forces from Agarthan missiles in her dragon form – which leads Claude to recognize she is the Immaculate One. In an even worse condition than before, she decides to reveal everything that she knows, and tells Byleth and Claude the truth about herself, the goddess, Agarthans, Nemesis, the Ten Elites, and the origins of Crests and Heroes Relics. Her fate in this route is left ambiguous, although considering her earlier claim of not having much time left during said exchange, and Catherine's S-Support stating she has nowhere to go, it is implied that she died shortly afterwards.

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Silver SnowEdit

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Rhea still accompanies Byleth as Byleth confronts and defeats Thales, and is still gravely injured attempting to shield Byleth's forces from Agarthan missiles in her dragon form. In this route, Rhea becomes berserk after revealing the truth and apologizing to Byleth, before her powers turn her berserk and she transforms into the Immaculate One, before flying off to Garreg Mach with several White Beasts and frenzied Church soldiers, prompting Byleth and the others to battle her to stop her and her "children" from rampaging across Fódlan. They are able to defeat her, despite the discovery of a "second" form (according to Seteth), and she crash-lands into the cathedral, where Byleth catches up. Rhea assumes them to be Sothis as she dies from her injuries.

If Byleth has obtained an A-rank support with Rhea, she survives the battle, where she decides to step down and has Byleth replace her as the archbishop of the Church of Seiros, before living in seclusion at Zanado. Alternatively, if Byleth obtains an S-rank support with her, she returns to her position after recovering and works with Byleth as her partner to bring peace to Fódlan.

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Crimson FlowerEdit

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Upon the Empire's declaration of war against the Church, Edelgard leads the Imperial Army and Black Eagle Strike Force to Garreg Mach to obtain a poliitcal advantage. Rhea deploys the Knights of Seiros to defend the monastery, but her attempt fails and the monastery is overrun. Desperate to change the tide of battle, she transforms into the Immaculate One in front of Byleth, before proceeding to launch a blast of energy to collapse the monastery on top of them.

Rhea then flees to the Holy Kingdom of Faerghus and builds her forces there in alliance with Dimitri. She eventually forms a plan to retake the monastery by attacking with a main force, while a secondary expedition force led by Seteth would secure the monastery from the sides. This plan fails however, as Seteth's force is intercepted and routed by the Black Eagle Strike Force, while the main army is unable to breach through the Empire's fortifications.

Following this defeat, she is informed that Seteth and Flayn have withdrawn from her cause (or their deaths if they were killed); if they withdrew, then she makes no effort to force them back in. Vowing to destroy Byleth, she returns to Fhirdiad. At the castle, she discusses her next plan of action with Dimitri, where they agree to intercept the Black Eagle Strike Force at the Tailtean Plains, to put them into a pincer trap. However, poor weather delays Rhea and her knights from arriving on time, forcing the Kingdom to fight alone at first. Upon arriving, she curses herself for her tardiness, stating that she has an opportunity to destroy the "fallen one" (Byleth). Should Rhea be defeated first, she and the rest of the Knights are forced to retreat, though the Altered Golems they brought along remain on the battlefield. Regardless, the pincer trap falls apart and Dimitri is killed in battle. Rhea tries to motivate her fellow Knights as they retreat to Fhirdiad, using the remnants of the deployed Kingdom Army to escape.

Upon arriving at Fhirdiad, Edelgard orders Rhea and the Church to surrender. Catherine asks her if they should remass their forces and fight another day, but Rhea orders both her and Cyril to torch the city, transforming into the Immaculate One, intending to show Byleth and Edelgard the true meaning of torment. She is supported by several Golems, along with the remnants of her Knights and Kingdom soldiers. Despite her power, she is eventually killed by Byleth and Edelgard. With her death, the Crest of Flames dissipates from Byleth's heart. While they lose the power of Sothis, their heart beats for the first time, restoring their humanity.

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PersonalityEdit

Rhea is what one would expect of a head of a church: benevolent, kind, and compassionate. While she is such to the devout followers of the church and the students and faculty of the Officers Academy, she is ruthless and dismissive of those who are against the church. That is not to say that she forces any under her service to be devout followers, as she is quite accepting of other people's ideologies such as Shamir and Cyril, but any who oppose the church with violence are dealt with by her self-righteous vision of justice and she even labels her defeats and misfortunes as judgment of the Goddess.

However, despite her position and many followers, Rhea is seemingly lonely, with several of her tea time and advice box questions having her admit she wants to interact with others and finds she has little to no time to relax in peace. She is particularly comfortable and friendly with Byleth during her interactions with them, as she repeatedly insists to them throughout their supports to not think of her as Rhea the Archbishop, but just Rhea, believing Byleth is the only person she can talk to as herself.


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Deeply tormented by her mother's death, Rhea is obsessed with the idea of resurrecting her, in part as a way to heal from her own suffering and return to the life she once knew. She also displays rather dishonest behavior having rewritten Fódlan's history to help her influence it, albeit with the desire to maintain peace. That, combined with her inability to trust others fully led to many of the events being both directly and indirectly caused by her. The most notable example is the fact that she knew that there was a mysterious group opposing her behind the scenes (albeit unaware of their connection to the Agarthans) but doesn't tell anyone any details she might have beyond that until after she is rescued in war phase of the game, if at all. Her secrecy in particular causes some of those personally close or loyal to her such as Jeralt, Aelfric and Seteth to be cautious and wary of her. In the Verdant Wind route, Claude, who is normally cool and collected, temporarily snaps into a moment of anger after learning that Rhea has hidden numerous secrets from the people of Fódlan.

In the Crimson Flower route, where Byleth, the bearer of Sothis's crest stone and consciousness, chooses to protect Edelgard instead of killing her, Rhea snaps at this "betrayal", believing the action of protecting Edelgard after all she has done is more than worthy of death. She also rages against Edelgard, having known her distant ancestor Wilhelm I, believing that she is defiling his legacy. Due to Byleth's "betrayal", Rhea reverts to her vengeful Seiros persona, increasingly becoming obsessed with destroying them, believing them to be the second coming of Nemesis. Though she is still able to maintain the loyalty of several of her Knights, such as Catherine and Gilbert, her constant ramblings and changed personality causes others immense discomfort, to the point that over the ensuing years of war a number of low-ranking members of the Church defect to the Empire, and even Seteth loses faith in her, believing that even if she won against the Empire, the Church would no longer be the same. He tells Byleth that he cannot support their actions, but neither can he support Rhea's current course. Their departure or deaths (should Byleth land the finishing blow on Flayn or both of them) further destabilize Rhea, and in her madness she blames Byleth.

However, in the Silver Snow and Verdant Wind routes where Byleth does not support Edelgard, Rhea maintains her sanity and becomes regretful of her more questionable actions during her time of imprisonment by Edelgard, admitting in her S-Support that while she did desire to keep the peace she was also driven by selfish and immature motives, and that it was wrong to not recognize Byleth was a separate person from Sothis. She then hands over her authority to Byleth, as she believes she is no longer worthy of the degree of influence she had. That said, in their paired ending after she recovers her strength she returns to her position of archbishop as she and Byleth (the actual leader of Fódlan) work together to reform and prosper the nation.

She is implied to undergo a change of heart in Azure Moon as well, as while she does not appear onscreen in part 2 she (just as in Silver Snow if she is A-ranked but not S-ranked by Byleth) cedes her position to Byleth and retires to live quietly in Zanado, potentially with Catherine and her husband (depending on her paired ending) as companions.

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In-GameEdit

Stats as an AllyEdit

The Battle of Garreg MachEdit

Skill FE16 sword icon FE16 lance icon FE16 axe icon FE16 bow icon FE16 brawl icon FE16 reason icon FE16 faith icon FE16 authority icon FE16 heavy armor icon FE16 riding icon FE16 flying icon
Level A D E E B A A A - - -
Start

Falling Short of HeavenEdit

Skill FE16 sword icon FE16 lance icon FE16 axe icon FE16 bow icon FE16 brawl icon FE16 reason icon FE16 faith icon FE16 authority icon FE16 heavy armor icon FE16 riding icon FE16 flying icon
Level A D E E B A A A - - -
Start

Stats as an EnemyEdit

The Battle of Garreg MachEdit

Skill FE16 sword icon FE16 lance icon FE16 axe icon FE16 bow icon FE16 brawl icon FE16 reason icon FE16 faith icon FE16 authority icon FE16 heavy armor icon FE16 riding icon FE16 flying icon
Level A D E E B A A A - - -
Start

Combat at Tailtean PlainsEdit

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The Fight for FhirdiadEdit

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The Final BattleEdit

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First FormEdit
Skill FE16 sword icon FE16 lance icon FE16 axe icon FE16 bow icon FE16 brawl icon FE16 reason icon FE16 faith icon FE16 authority icon FE16 heavy armor icon FE16 riding icon FE16 flying icon
Level E E E E E E E E - - -
Start
Second FormEdit
Skill FE16 sword icon FE16 lance icon FE16 axe icon FE16 bow icon FE16 brawl icon FE16 reason icon FE16 faith icon FE16 authority icon FE16 heavy armor icon FE16 riding icon FE16 flying icon
Level E E E E E E E E - - -
Start
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QuotesEdit

See Main Article: Rhea/Quotes.

SupportsEdit

See Main Article: Rhea/Supports.

Rhea can only form a support with Byleth. She can form an S-Support with both genders of Byleth.

Possible Endings Edit

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Rhea and Byleth

After finally saving both Fódlan and Rhea from Crisis, Byleth ascended the throne as the first leader of the United Kingdom of Fódlan. From her/his temporary residence at Garreg Mach Monastery, she/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.
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Non-Canon AppearancesEdit

Super Smash Bros.Edit

Rhea appears in Super Smash Bros. Ultimate as a background character at Garreg Mach Monastery. She also appears as a spirit, using new artwork to represent her.

Fire Emblem 0 (Cipher)Edit

Rhea is illustrated in the trading card game Fire Emblem Cipher with the following cards:

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Etymology Edit

Rhea is a Greek titan known as the "Mother of the Gods." The name may also refer to the mother of Romulus and Remus, the mythical founders of Rome.


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Seiros may be derived from Seirios, Greek for "scorching", and an alternate name for the star Sirius.

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Trivia Edit

  • Rhea shares her Japanese voice actor, Kikuko Inoue, with Deirdre in Fire Emblem Heroes.
  • Rhea shares her English voice actor, Cherami Leigh, with Mae and Emma in Fire Emblem Echoes: Shadows of Valentia as well as Caeda, Gwendolyn, and Cecilia in Heroes.
  • Rhea is one of the characters who can have S-Supports with both a male and a female Byleth. The others are: Mercedes, Jeritza, Dorothea, Edelgard, Sothis, Linhardt, Yuri, Alois (platonic) and Gilbert (platonic as well).
  • Rhea has unused growth rates and quotes, implying she may have been initially developed with the possibility of being playable.
  • In a survey conducted by Famitsu Magazine, Rhea placed 16th for females and 32nd overall with 120 votes in the character popularity poll for Fire Emblem: Three Houses.
  • Prior to the release of the fourth wave of DLC for Three Houses, Rhea was the only character with whom Byleth could support that could not be invited to tea parties.
  • 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+).


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  • 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.
  • Rhea is the only character to serve as the final boss of more than one story route in Three Houses.
    • As the final boss of the Silver Snow route, Rhea is driven into a berserk fury by her draconic power as her body becomes too weak to control it, and her form as The Immaculate One becomes warped. Although not referred to as such in Three Houses, this is a condition similar to the degeneration that led Manaketes in past Fire Emblem games to fall into madness.
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GalleryEdit

See main article: Rhea/Gallery.
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