Catherine

Catherine was born to House Charon in the Holy Kingdom of Faerghus under the name Cassandra. She attended the Officers Academy in the Blue Lions House, alongside her best friend Christophe. One day, she and her classmates were tasked with killing monsters, but they were ambushed and she nearly died. Rhea saved her and nursed her back to health. Some time after graduating, she was implicated in a plot to kill the king and had to flee the kingdom, becoming an outlaw. She sought safety at Garreg Mach Monastery and Rhea took her in, making Cassandra her knight. Cassandra then changed her name to Catherine. During this period, she also was responsible for capturing Christophe and turning him over to the Knights of Seiros for execution, which cleared her of any wrongdoing. However, in response, Christophe's father Lonato pinned a baseless crime on her, making it impossible for her to ever return to Faerghus. The incident would haunt her for the rest of her life.

When Shamir joined the Knights to repay a debt for Rhea, Catherine took the time to introduce herself to her. When Shamir simply introduced herself to her in turn, Catherine was surprised by her response and believed that she would be hard to get along with. This changed during battle, when the two saw each other's strengths and decided they worked best as a team.

Catherine is introduced to Byleth, and will accompany them and their class on any route in their second mission as a professor at Garreg Mach Monastery, quelling a rebellion lead by Lord Lonato against the church. She showcases her sword, Thunderbrand, and explains about Heroes Relics and the 10 Elites. She helps to engage Lonato, and is ultimately there when Byleth and their class kill him.

Regardless of route, Catherine chooses to defend Garreg Mach monastery during the Empire's assault on Garreg Mach Monastery. If Byleth decides to side with Edelgard, she appears as enemy reinforcements during Outset of a Power Struggle. Otherwise, she can appears as allied reinforcements to fight alongside Byleth in defense of the Monastery in any route where she is not recruited.

If Byleth decides to side with Edelgard, Catherine becomes disgusted with their decision and remains with Rhea to defend her from the Empire. If Byleth faces her, she shows disgust at their actions and vows to strike them down, but is defeated and forced to retreat.

Catherine accompanies Rhea to retake Garreg Mach from the Empire, battling a large force who intercepted them. The attack was meant as a distraction to allow Seteth's expeditionary force to recapture the monastery, but the plan falls apart when the force is routed by the Black Eagles. If both Seteth and Flayn were spared by Byleth, Catherine gives Rhea a letter from him.

In Petra and Bernadetta's shared Paralogue, Petra decides to meet with her grandfather to obtain reinforcements and remain in the Empire's good graces. Due to this, Catherine is sent by Rhea to Brigid to persuade them otherwise. She is defeated yet again in battle, and forced to retreat as Brigid maintains its alliance with the Empire.

Following the Empire's victory at Tailtean Plains, Rhea retreats to the Kingdom capital of Fhirdiad, where Catherine and Cyril are waiting for her. Edelgard orders the Church to surrender and be spared, waiting for their response before attacking. Catherine tells Rhea that the Empire is waiting for their response, and states that she will be loyal to her until the end. Rhea then orders her and Cyril to torch the city, much to her shock. Initially unwilling to torch the city, she suggests they simply retreat and remass their forces to fight another day. Rhea refuses and reiterates her orders to torch the city, which she reluctantly complies with.

If Byleth battles Catherine again, she states her disgust and tells them that she wished that they never became a professor and came to Garreg Mach and the fact that she knew they were trouble, but did not do anything, proclaiming that she will rectify her mistake by killing them in battle. If Shamir battles her, they both state that they had expected this day to come. Although Shamir expressed worry about Catherine (remarking that she would come to kill her with "mixed emotions of love and hate"), should she battle her, Catherine does not express any resentment towards her betrayal. She may be spared if the Immaculate One is defeated first, though her fate is left unknown.

Catherine remains with the Knights of Seiros, assisting Byleth and the others in ending the war against the Empire and locating Rhea. In Azure Moon, she is delighted to see that she is alive, albeit in a weakened state. When Rhea steps down as archbishop, Catherine could potentially accompany her to Zanado, along with her husband, depending on her ending.

In Verdant Wind route, Catherine becomes saddened with Rhea's death, leaving the Knights of Seiros and becoming a wandering mercenary, although depending on her ending she may opt to settle down with her husband.

Silver Snow applies both Azure Moon and Verdant Wind's for Catherine, depending if Byleth obtained an A-Rank support with Rhea or not.

Despite being a member of House Charon, one of Faerghus' most noble and prominent houses, Catherine dislikes her noble title, as she feels that it keeps her chained to a life she doesn't want to live. In her ending with Lorenz should Rhea be killed, it states that she preferred relaxing in a tavern rather than dressing up for court.

Catherine - Free Knight (Verdant Wind/Silver Snow*)

Catherine left the Knights of Seiros and set out to travel across Fódlan. With Thunderbrand in hand, she wandered the countryside, seeking always to defend the innocent and punish the wicked. Her many years of heroics ensured that she would always be remembered by the people as a beloved folk hero.

Catherine - Guardian of Zanado (Azure Moon/Silver Snow**)

When Rhea resigned her position of archbishop and left the Church of Seiros, Catherine followed. She devoted herself wholly to Rhea's protection, and the two lived a life of quiet seclusion. Though Thunderbrand remained always by her side, she came to be known by a different name: the Guardian of Zanado.

Catherine and Byleth (Verdant Wind/Silver Snow)

Byleth announced his marriage to Catherine shortly after becoming leader of the United Kingdom of Fodlan. While the king focused on the rebuilding effort, Catherine worked as his bodyguard, and when the situation called for military force, she mobilized the troops and went to battle. Under her watchful eye, Fodlan entered a new era of peace. A common saying among the people was that the king of Fodlan had two weapons: the Sword of the Creator, and his fearsome wife.

Catherine and Byleth (Azure Moon)

Byleth announced his marriage to Catherine shortly after becoming archbishop of the Church of Seiros. While the archbishop focused on the rebuilding effort, Catherine worked as his bodyguard, and when the situation called for military force, she mobilized the troops and went to battle. Under her watchful eye, Fodlan entered a new era of peace. A common saying among the people was that the king of Fodlan had two weapons: the Sword of the Creator, and his fearsome wife.

Catherine and Linhardt (Verdant Wind/Silver Snow*)

Catherine left the Knights of Seiros and set out to travel across Fódlan. With Thunderbrand in hand, she wandered the countryside, seeking always to defend the innocent and punish the wicked. During these years of heroics, she had an unusual traveling companion in Linhardt, who had renounced his noble title and followed her. During their adventures, Catherine was said to be nearly unstoppable, and Linhardt all but useless—except in moments of great need, when the Crest scholar's wisdom would suddenly carry the day. The pair's adventures lived on as beloved folktales, passed down through the generations. It is unclear whether the two were ever romantically involved.

Catherine and Linhardt (Azure Moon/Silver Snow**)

When Rhea absconded her post as archbishop, Catherine resigned from the Knights of Seiros and accompanied her to a life of seclusion in the Red Canyon. They were joined by Catherine's new husband, Linhardt, who continued his Crest research at Catherine's behest. Motivated by his wife, and freed from all other distractions, Linhardt made new discoveries at an astonishing rate. The fruits of his research brought about dramatic changes in the world of Crest research, but for the sake of his privacy, Linhardt always published his papers anonymously.

Catherine and Caspar (Verdant Wind/Silver Snow*)

Catherine resigned from the Knights of Seiros and traveled across Fódlan with Caspar. They dedicated themselves to defending the helpless wherever they went, and in time, the names Thunder Catherine and Inferno Caspar were known to all the world. Legends of their adventures became so popular and well-known that even catchphrases such as "Face the wrath of Thunderbrand!" and "Hey, that's not your sword!" were recounted in the stories that were passed down for generations.

Catherine and Caspar (Azure Moon/Silver Snow**)

When Rhea absconded her post as archbishop, Catherine resigned from the Knights of Seiros and followed in order to protect her. They were joined by Catherine's new husband, Caspar, who had the same goal, and together they retired to a life of seclusion in the Red Canyon. Caspar and Catherine spent the bulk of their days farming and hunting, but since neither was content to go a day without wielding a weapon, they sparred routinely. The sound of their swords ringing out, in time with Caspar's heated cries, was heard daily across the valley.

Catherine and Dimitri

Dimitri assumed the throne of the Holy Kingdom of Faerghus and spent his life ruling justly over Fódlan. Two years after his coronation, he announced his marriage to Catherine. The people speculated wildly about how this union came to be. Some said that Dimitri spent two full years wooing her, while others suggested that the matter was resolved by a duel. In any case, the couple worked tirelessly to reform the Kingdom, but despite their busy days, it is said that they always found time for sparring, and that the clash of steel could be heard throughout the castle at all hours.

Catherine and Ashe (Verdant Wind/Silver Snow*)

After the war, Ashe was formally knighted and appointed the new head of House Gaspard, which had no successors. He asked Catherine, who had left the Knights of Seiros, to marry him, but she declined, convinced that the people of Gaspard territory would never accept it. Refusing to set his love or Catherine aside, Ashe worked diligently along with the Church of Seiros to expose the full truth of the Western Church's plot. With great persistence, he convinced the people of this truth, and then persuaded Catherine finally to reconsider. The people received her reluctantly at first, but over time, they recognized her virtue and came to accept her.

Catherine and Ashe (Azure Moon/Silver Snow**)

When Rhea resigned her position of archbishop and left the Church of Seiros, Catherine followed, and the pair began a life of seclusion in the Red Canyon. Years later, they began to hear rumors of a wise young man who had been knighted and appointed lord of House Gaspard. Soon they were approached by that lord, Ashe, who came to the Red Canyon to kneel before Catherine and ask her to be his wife. With Rhea's encouragement, Catherine was persuaded to accept. She left the Red Canyon with him, and the two began their journey together.

Catherine and Lorenz (Verdant Wind/Silver Snow*)

As the new head of House Gloucester, Lorenz first worked to restore his own territory, and then expanded his vision to include reforms for all Fódlan. At the height of his storied political career, he announced his marriage to Catherine, the former Knight of Seiros. Catherine had left Garreg Mach behind for a life of freedom, but was eventually persuaded to accept Lorenz's passionate marriage proposal. Even after joining House Gloucester and returning to a life among the nobility, however, it is said that Catherine much preferred relaxing in a tavern to dressing up for court.

Catherine and Lorenz (Azure Moon/Silver Snow**)

As the new head of House Gloucester, Lorenz first worked to restore his own territory, and then expanded his vision to include reforms for all Fódlan. At the height of his storied political career, he announced his marriage to Catherine, the former Knight of Seiros. Catherine had been living a quiet life of seclusion with Rhea in the Red Canyon, and it was the encouragement of the former archbishop that persuaded her to accept Lorenz's ardent marriage proposal. Even after joining House Gloucester, however, it is said that Catherine never lost sight of her lifelong oath to guard and watch over Rhea.

Catherine and Seteth (Verdant Wind/Silver Snow*)

After the war, Seteth fully confessed his love to Catherine and asked her to marry him. Refusing to remain at the monastery, however, Catherine declined. Over the years, as Seteth worked to rebuild the church, he continued to write love letters to Catherine. Her answer was always the same. Finally, when the rebuilding effort was complete, Seteth left the church and went to see her, declaring his love anew. With no more reason to refuse him, she at last accepted his proposal. The two were wed, and swore to walk side by side together through the new age.

Catherine and Seteth (Azure Moon/Silver Snow**)

After the war, Seteth fully confessed his love to Catherine and asked her to marry him. Intending to accompany Rhea to a life of seclusion, however, Catherine declined. Over the years, as Seteth worked to rebuild the church from the monastery, he continued to write love letters to Catherine. When the rebuilding effort was complete, he journeyed to the Red Canyon, where she and Rhea had been living, and delivered all of his letters by hand. Catherine was deeply moved, and with Rhea's blessing and no more reason to refuse him, she accepted his proposal. The two were wed and lived out their lives happily alongside Rhea.

Catherine and Seteth (Silver Snow***)

After the war, Rhea resumed her duties as the archbishop, and Seteth and Catherine joined her in rebuilding the Knights of Seiros. As ever, Seteth served as her second in command and Catherine remained one of her most trusted protectors. When the hard work was over and all had been restored, Seteth confessed his love to Catherine and asked her to marry him. Though initially reluctant, Catherine is said to have been persuaded to accept by a nudge from Rhea herself. The two were wed in a packed and lively ceremony, and afterward they lived out their lives happily as husband and wife.

Catherine and Alois

Alois officially took up the title of captain of the Knights of Seiros. In this new role, he led the knights to many victories, and was much beloved. At the same time, he developed a reputation for gullibility, and his subordinates began to play tricks on him regularly. To help him deal with this, Catherine volunteered her services as an adviser. She kept a look out for him, and put a stop to these antics before they began. The combination of the kindly captain and the intimidating wielder of Thunderbrand proved strong, and the Knights of Seiros prospered.

Catherine and Shamir

After quitting the Knights of Seiros, Catherine and Shamir set out on a lifelong journey together. The pair were inseparable as they traveled across Fódlan, and eventually wound up in Shamir's homeland of Dagda. They faced many hardships on their adventures, some of which were self-inflicted, as the duo had a way of sticking their noses into others' business in their efforts to right wrongs. It is said, however, that no foe they encountered ever proved a match for the combined might of Shamir's marksmanship and Catherine's Thunderbrand.

* Requires Byleth to not achieve an A Support with Rhea.

** Requires Byleth to have an A Support with Rhea.

*** Requires Byleth to achieve S Support with Rhea.