Lucina Is Not The Same as Prince Marth, But Really Close
Sigurd being Marth's ancestor makes sense, shoehorned as it is. .. And by such loose logic, technically Chrom/Lucina would be related too as. including your religious or political views, health, racial background, country of origin, sexual identity and/or personal relationships. To learn. Facing a dummy, Lucina decided to test out a new legendary sword move but I am trying to learn this technique that the hero king Marth once.
Still calling herself Marth despite the demasking, she helped defend Emmeryn while Chrom focused on eliminating their leader, Validar. She disappeared again after the battle, resurfacing briefly later on after Emmeryn's suicide at the Plegian capital, lamenting her failure to change fate.
With Chrom Lucina's left eye, revealing her Brand. For the next two years after Emmeryn's death, Lucina did not appear again throughout the end of the Plegian war or Chrom's reconstruction efforts. She resurfaced in the aftermath of Chrom's diplomatic meeting with the new Plegian king Validar on the Carrion Isle, defending him from the sudden appearance of a Risen assassin but accidentally calling him "Father".
Afterward she revealed her true identity as Chrom's daughter, properly reuniting with him and with her initially-disbelieving mother.
She gave Chrom and company a brief explanation of her origins from a Grima-ruled timeline and formally joined Chrom's party, seeking to prevent Grima's resurrection by aiding Chrom in the Valmese war and beyond.
She also told Chrom of her eleven lost companions and how they may likely be found throughout the world. In response to the castle being surrounded by the emperor Walhart 's legions, Basilio resolved to lead a legion to distract him to allow Chrom's escape, only to be stopped by Lucina. Lucina revealed that in her timeline, this mission is what killed Basilio and attempted to dissuade him from going.
Though she failed, her words convinced Flavia to go with him and ensured Basilio would be more cautious in battle, although Chrom's army was later informed that he had died anyway. Following the Valmese war, Lucina accompanied Chrom to meet with Validar again in the Plegian capital, on the promise of receiving the final gemstone for the Fire Emblem. Before attacking them, Validar referred to Lucina as an interloper, revealing his knowledge of her otherworldly origins, and in the battle's aftermath Lucina bore witness to Robin snatching the Emblem from Chrom's hands under Validar's control.
This event confirmed for her the suspicion that in her timeline, it was Robin who killed Chrom, doing so at Validar's mercy. To protect Chrom's life she resolved to execute Robin, only to be stopped by Chrom himself, who reaffirmed his utmost confidence in Robin.
She accompanied them in the battle to stop Grima's revival at the Dragon's Tableonly to witness Robin indeed strike down Chrom under Validar's influence. Though she initially believed it to be real, she was soon proven wrong with the reappearance of Basilio, who confirmed everything to be a ruse orchestrated by Robin. With Chrom still alive, she again aided them in fighting off Validar and the Grimleal one final time, and bore witness to the reappearance of Grima, in the form of her timeline's Robin, and his resurrection of his full dragon body.
Having fled the Table with Chrom and his army as it collapsed under Grima's revival, Lucina travelled with them to Mount Prism to allow Chrom to perform the full Awakening.
She accompanied Chrom and Robin in the final battle against Grima. If unmarried, she goes to Ylisstol one final time, and whispers to her infant self that she will live a better life than she did, before disappearing, leaving no trace of what happens to her. Yet another alternate-timeline Lucina, along with her friends, was the subject of a rescue effort by the main-timeline Chrom and the Shepherds.
In their reality, similar to the one the main Lucina came from, Grima's conquest of humanity was nearing completion, with Risen flooding the land and murdering all who crossed their path.
Lucina and her allies worked to save the world from Grima, and enacted a plan to find the Fire Emblem and its gemstones for use in an Awakening. Believing to have altered the future, Lucina leaves. However after Emmeryn's sacrifice at her execution, Lucina realizes that the timeline is now set back on its course.
Two years after Gangrel's defeat by the hand of Chrom, the present timeline's Lucina is born to Chrom and his wife. Conquest of Valm After talking to the new king of Plegia, Validar, Chrom and the Avatar prepare to depart the next day. That night a group of Risen ambushes Chrom's army.
After clearing nearly all of the Risen, a Risen assassin suddenly warps behind him, but Lucina steps in and protects her father. Chrom is still curious as to who she is and Lucina can no longer bear to hide her secret from him. Lucina tells Chrom to look into her left eye. As he gazes closely into her eye, he sees the Brand of the Exalt, the exact same one that his infant daughter has back at Ylisstol. Lucina begins to tear up, but Chrom warmly wipes away her tears.
Lucina finally embraces her long lost father, weeping in his arms. After, Chrom brings Lucina to her mother who cannot believe that she is their future daughter. Nevertheless, after seeing the Brand in her eyes, her mother happily accepts Lucina and the two embrace each other.
Collecting herself from the reunion, Lucina reveals to Chrom, the Avatar, and Lissa of the apocalyptic future she came from where the Shepherds were all killed, leaving behind only their children. With the resolve to change the future and to protect her parents, Lucina joins the army.
After capturing Fort Steiger from the Valmese, Chrom receives alarming news that the forces up to the north were crushed by Walhart's forces, and the forces to the south were destroyed by Yen'fay's forces.
When Khan Basilio volunteers to stall their army, Lucina steps in to try and stop him since, in her timeline, Basilio perished when he went.
Nevertheless, Basilio's resolve is stronger than Lucina's warning, though Flavia decides to go. Soon after, word arrives that despite the different events, Basilio was slain regardless.
Remembering his sacrifice, Chrom's army finally take down Walhart's forces, once and for all. On the way to the castle, Lucina sees what appears to be Grima's remains, telling Chrom that Grima must not be resurrected in this timeline. Upon reaching Plegia's castle, Validar betrays the group and tries to seize the Fire Emblem from Chrom, forcing them to flee.
Chrom, the Avatar, and Lucina nearly make it out of the castle, but Validar warps in and weakens Chrom. Validar orders the Avatar to seize the Fire Emblem and the Avatar does against their will. Lucina reluctantly decides to kill the Avatar to prevent this, who can choose to accept her judgement or not.
Regardless of the Avatar's choice, as she is about to kill the Avatar, Chrom, who was watching the scene unfold, steps in and stops her. Lucina does her best to convince her father that killing the Avatar is for the greater good, but Chrom places his trust in the Avatar, and Lucina puts her faith in their bond to overcome what lies in the future.
Alternatively, if Lucina is married to the male Avatar, regardless of his choice, she will not go through with it when the Avatar makes his last request for her to find someone to keep her happy. In addition, if her mother is the female Avatar, regardless of her choice, Lucina cannot bring herself to kill her own mother. She then learns that this was all a ruse by Chrom and the Avatar and they swiftly defeat Validar. However, a mysterious black figure warps in and takes on the appearance of the Avatar.
Grima reveals that he is indeed the one who possessed the Avatar in the alternate future and followed Lucina into the past.
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He is able to revive the dragon body of the present Grima, causing Lucina to look in horror as she remembered what had happened in her future.
Nonetheless, all is not lost, as the Avatar manages to steal the Fire Emblem from Validar before it was dropped into the Dragon's Table. Now with the power to take down Grima, Lucina aids Chrom and the Avatar for the final battle with Grima. After defeating the Fell Dragon, if Lucina is not S-supported with anyone, she goes to Ylisstol and whispers to her infant self that she will live a better life than she did and promptly leaves, leaving no trace of what happens to her after.
It can be presumed that she lived the rest of her life under a new alias, or returned back to her own time knowing that all would be well in the present timelime. Fates Lucina makes an appearance in Fire Emblem: Fates, and requires her amiibo in order to be playable.
When she appears in My Castle for the first time, she introduces herself to the Fates Avatar and remarks excitedly towards their castle and kind comrades. She asks for the Avatar's name and expresses a nostalgic feeling towards them, hinting the Fates Avatar's similarities towards Awakening's Avatar.
She then offers them one of two accessories which the player can choose from, a Bear Hair Pin and her own Butterfly Mask, as a token of her appreciation and promises to meet them again should they ever need her, no matter how far she travels. During her second appearance, she notes about her experiences in Super Smash Bros. If Owain, Inigo and Severa have been recruited, they will be surprised to see each other again when one of them is faced against her in battle. However, all three children will note that something seems "off" about her.