NOTE: This page is only for Rhea/Seiros in the Crimson Flower Route, which is the only route where she serves as a villain. ✓
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|“||So, this is the choice you have made. You are just another failure. Your presence soils this Holy Tomb and disgraces my brethren. I will not allow one who would lend our enemies strength to wield the power of the goddess Sothis! I have passed judgement! And now, I shall now rip your chest open, and TAKE BACK YOUR HEART MYSELF!||„|
|~ Rhea's villainous breakdown upon seeing Byleth side with Edelgard von Hresvelg.|
|“||I have no patience for foolish questions. I shall sacrifice as many lives as it takes! That apostate who insists on taking everything from me WILL BE CRUSHED BY MY OWN HANDS!||„|
|~ Rhea/Seiros to Catherine regarding Byleth.|
|“||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!||„|
|~ The Immaculate One fighting Edelgard.|
Seiros, also known as Rhea and the Immaculate One, is a major character in Fire Emblem: Three Houses. She serves as the founding saint and Archbishop of the Church of Seiros.
Because of her antagonistic role in the Crimson Flower route, as well as her other morally grey acts, Seiros can be considered as one of the two secondary antagonists (alongside the Flame Emperor) in the overall game. She remains as a sympathetic, non-villainous character in the other three routes.
As Rhea, she serves as the deuteragonist in the Acadamy Phase (pre-timeskip), though, as a red-herring to the Flame Emperor, she is portrayed with questionable motives. In the War Phase (post-timeskip), she serves as either an alluded or supporting character in three of four routes, being the deuteragonist (and the final boss after she loses control of her power) in the Church route (however, she does not play a villainous roll in this route, despite being the final boss), a mentioned character in the Blue Lion route, and a major character in the Golden Deer route. In all three routes, one of the primary goals is rescuing Rhea from captivity within the Empire.
However, in the Crimson Flower route, Rhea, who takes back on the guise of Seiros, gradually descends into madness after Byleth betrays her, choosing to side with Edelgard von Hresvelg, who was revealed to be the Flame Emperor. She becomes obsessed with killing Byleth and recovering the Crest Stone within their heart, becoming the main antagonist of the second half of the game.
Before Church history, Rhea and the other Children of the Goddess (known as Nabateans) were born of the Progenitor God, Sothis, upon her arrival in Fodlan. They lived peacefully for a time within Zanado, the Red Canyon, coexisting with the native peoples of the land and sharing Sothis's knowledge with them. However, a betrayal by humans that led to the murder of the Goddess Sothis, massacre of the people living in Zanado, and genocide of the Nabatean race left Rhea, the sole survivor of the massacre, fearful and distrustful of humanity. Years after the massacre, Rhea took on the disguise of Seiros--dyeing her distinctive green hair blonde, hiding her ears, and portraying herself as a human woman who had received a revelation from the Goddess--and began a quest to take revenge on the man responsible, Nemesis.
According to the Church's legend, Seiros is the founder of the Church of Seiros, which was named after her. It is said she was a human woman who received a revelation from the Goddess that was a "gift to guide the lost." However, the myth of the Church is a deliberate partial distortion of real history to hide her true, inhuman origins. Seiros was not a human in fact, but a member of the Nabatean race, the children of the Goddess Sothis, who lived in Zanado, the Red Canyon, before Sothis was betrayed and murdered by Nemesis, whom history portrayed as a former savior of Fodlan with the Goddess's blessing who became a bandit after being corrupted by his power. In reality, Nemesis was never a heroic figure, but a bandit empowered by a Sothis's enemies, the Agarthans, also known as Those Who Slither in the Dark, who fed his bloodlust and quest for power by directing his violence against their Sothis and the Nabateans. Those Who Slither in the Dark forged the Sword of the Creator from Sothis' bones, which Nemesis then used to commit genocide against the Nabateans, whose bones were then also forged into weapons by Those Who Slither in the Dark and gifted to his allies, the Ten Elites.
Traumatized, Seiros became distrustful and vengeful towards humans, believing Nemesis' hunger for power and subsequent treachery to be a consequence of human nature. She became obsessed with reviving Sothis, who she believed could guide and heal the world.
War of Heroes
As Nemesis' power grew, he began to terrorize and wage war across the land of Foldan. To end his tyrannical reign and exact her revenge against Nemesis for the murder of her mother and genocide of her people, in Imperial Year 91, Seiros formed an alliance with Wilhelm Paul Hresvelg, the founder of the Adrestian Empire, by sharing her blood with him, giving him the Crest of Seiros. With the combined forces of herself, Wilhelm, and the survivors of the Nabatean genocide, the Four Saints, Seiros led the battle against Nemesis and the Ten Elites, killing him in hand-in-hand combat at the Tailtean Plains.
During the War of Heroes, Seiros helped Wilhelm establish the Adrestian Empire, crowning him as its first emperor. After the War, she founded the Church of Seiros, rewriting history via Church doctrine to obscure the existence of Nabateans and protect the few that remained. These revisions included claiming that the Crests were gifts from the Goddess to humanity (rather than the stolen blood of Nabateans), that the Ten Elites were heroes (rather than allies of Nemesis who helped in his conquest of Fodlan), and obscuring Nemesis' original, villainous past, instead portraying him as a hero (initially blessed by the Goddess) who was corrupted by power and fell from grace. She also claimed that the weapons forged from Nabatean bones were "Heroes' Relics" gifted to humanity by the goddess, rather than the bodies of her massacred family, in order the hide their true nature and the Nabatean genocide that led to their creation from the people.
After the establishment of the Church, Seiros began her endeavour to revive Sothis, whom she believed could restore the land after all the violence and war it had seen. She created artificial homunculi to serve as vessels for the Goddess, though these experiments never proved successful.
As Nabateans have a longer life span than humans, Seiros faked her death to not arouse suspicion and instead controlled the Church from behind the scenes. A thousand years later, she assumed the alias of Rhea and once again assumed direct control of the Church as Archbishop. During her tenure as Archbishop, Rhea shared her blood with Jeralt to save his life, granting him the Crest of Seiros and extending his lifespan. She also attempted a twelfth try at creating a vessel for Sothis during this time. While the experiment failed at reviving Sothis, she successfully created a living artificial human with Sothis's Crest Stone as her heat, whom she named Sitri and came to view as a daughter. Sitri and Jeralt fell in love and married, but due to Sitri's poor health, she was unable to bring a viable pregnancy to term, giving birth to a stillborn and dying in childbirth. On her deathbed, Sitri begged Rhea to use her own heart (Sothis's creststone) to revive her child, Byleth. Rhea implanted Sothis's Crest Stone in their heart when they were a baby, which gave them life. Because of this, Rhea believed that Byleth would be the perfect vessel for the Goddess.
However, 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 and never cried. Losing his faith in Rhea after believing his wife died of something else, Jeralt faked his and Byleth's deaths and left the Knights of Seiros with his child. Twenty years later, after being discovered by students of the Church's Academy, Dimitri, Edelgard, and Claude, and a Knight of Seiros who knew Jeralt, Alois, Jeralt was compelled to return to the Church's service and reveal his child's existence to Rhea. In the years following Jeralt's disappearance, two of the Four Saints, Cichol and his daughter Cethleann, joined Rhea at Garreg Mach Monastery, taking the names Seteth and Flayn respectively and masquerading as brother and sister.
Black Eagle (Crimson Flower)
Note: This route can only be achieved by choosing the Black Eagle, attending Edelgard's ascension ceremony in time and choosing to spare her.
After Byleth betrays Rhea and the Church of Seiros, choosing to defend Edelgard instead of killing her when she attacked the Holy Tomb of the Church, which held the remains of many Nabateans the Church was protecting, Rhea grows furious with Byleth, transforming into The Immaculate One. Before she can defeat them, though, they flee. After the Adrestrian Empire and the Black Eagles successfully storm Garreg Mach Monastery, she transforms again and attacks Byleth. Byleth goes missing for five years and, unlike other routes, Rhea is not captured. In those five years, Rhea and the Church of Seiros are granted asylum within the Holy Kingdom of Faerghus by the newly crowned King Dimitri, forming an alliance with him against Edelgard and the Empire and fighting them to a standstill.
She slips further down into madness and revenge over Byleth's betrayal and eventually chooses to discard her alias as Rhea and just be called Seiros again. While Edelgard and the Black Eagle Strike Force capture what is left of the Leicester Alliance and either kill or exile Claude, Rhea plans an assault to recapture the Monastery in their absence, with Seteth and Flayn appearing in the battle. If fought by Byleth, Seteth notes that even he can't follow Rhea/Seiros' course anymore, despite being her advisor for so many years. They can be spared if defeated by Byleth, after which the two will go into hiding. In this scenario, Seteth will send Seiros a letter after the battle, explaining that while he despises Byleth for their betrayal, he prioritizes Flayn's safety above all else. Regardless of the outcome, Seiros becomes even more furious at Byleth for taking them away from her as well.
She appears alongside Dimitri in the penultimate chapter as an optional enemy commander, hoping to intercept the Imperial army on their way to conquer Fhirdiad, the capital of Faerghus. Seiros is, of course, defeated and retreats. As the Imperial army nears Fhirdiad, she orders Catherine and Cyril to torch the city, disregarding the civilians still residing there; Catherine initially objects, but reluctantly agrees. For the final battle, Seiros transforms into The Immaculate One once again and fights the Empire out of blind hatred. Upon her defeat, Byleth and Edelgard strike her down once and for all, causing Byleth's Crest of Flames to disappear and their hair and eyes to return to normal, and their heart to start beating for the first time in their life.
Super Smash Bros. Ultimate
In Super Smash Bros. Ultimate, Seiros in her Rhea form both appears as a background character in the Garreg Mach Monastery stage and as one of Byleth's DLC spirits. As a spirit, she is an Ace level spirit under the Neutral type. In her spirit battle, the fight is set to being a stamina match on Bridge of Eldin, with the player first required to beat a Palutena, then a giant white Charizard. When equipped, she grants stronger magic attacks.
Fire Emblem Heroes
In Fire Emblem Heroes, Rhea is available in several playable forms. As Seiros, she is available as a Mythic Hero (Seiros: Saint of Legend). As Rhea, she is available as a Halloween themed Special Hero (Rhea: Witch of Creation) and as the secondary hero in a pair of Summer themed Duo Heroes alongside Byleth (Byleth: Fell Star's Duo).
|“||Tell me, Nemesis! Do you recall the Red Canyon?! You'll die for that! Die! DIE! You took..everything..THAT I LOVED!||„|
|~ Seiros to Nemesis before she stabs him.|
|“||You... How dare you betray me... You worthless piece of garbage... I will punish you myself!||„|
|~ Rhea preparing to fight Byleth.|
|“||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 before fighting Edelgard.|
|“||Rhea: Seteth... Flayn... First my mother, and now those two have been stolen away as well? MUST YOU TAKE EVERYTHING FROM ME?!
Catherine: Lady Rhea...?!
Rhea: No amount of repentance will bring your wretched soul salvation. YOU WILL BE CHAINED TO THE VALLEY OF TORMENT… ETERNALLY WALK THE DESERT UNTIL THE SKIN ROTS FROM YOUR BONES!!! I will ensure that you pay for your sins, Professor! In the name of the Nabateans, I SWEAR IT!!!!
|~ Rhea getting angry if Seteth and Flayn were killed and Catherine getting surprised in the process|
|“||Call me Seiros now. I am no longer the archbishop, but rather a warrior.||„|
|~ Seiros discarding her alias as Rhea and calling herself by her real name again.|
|“||How could this be? I lost to that thief?! UNACCEPTABLE!||„|
|~ Rhea/Seiros after she loses her battle.|
|“||Give her back! GIVE BACK MY MOTHER! GAAAAAAHH!||„|
|~ The Immaculate One|
- Seiros/Rhea is the only final boss of the game that is fought in two routes.
- Rhea is the only major (potential) supporter of Byleth that remains unplayable in all routes, even in the Silver Snow chapter/Church route. Through datamining, however, there are unused data for Rhea/Seiros that she was meant to be a playable and recruitable character during the production, like Sothis and Jeralt, but was eventually finalized as an NPC character. In Fire Emblem Warriors: Three Hopes, she, along with Sothis, became unlockable playable characters in New Game+, while Jeralt can be recruited and become playable if the player spares him.
- Etymology: Rhea is named after a Greek titan known as the "Mother of the Gods" due to being the mother of major Olympians including Zeus, Poseidon, Hades and Hera. The name may also refer to the mother of Romulus and Remus, the mythical founders of Rome.
- Seiros may be derived from Seirios, Greek for "scorching", and an alternate name for the star Sirius.
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