This section aims to explore various aspects of Lucina and go into more depth about them. Here I will attempt to analyze various aspects of Lucina and produce an in-depth look to each area.
The way Lucina looks and dresses is reminiscent of Marth. Considering she is a descendant of him and assumed his identity for a time it is hardly surprising. The resemblance is so similar in fact that she was once mistaken for being Marth, even when she went under her true identity as Lucina, the princess of Ylisse. This is seen in Chapter 16: Naga's Voice when Chrom's army had gone to speak with Tiki, the voice of the Divine Dragon, who called her "Mar-Mar" (the nickname she had given Marth) thinking she was him before being corrected by Lucina. I suppose you could say that Lucina is like a female version of Marth.
Lucina: ...My name is Lucina, milady. Though I did go by the name Marth for a time. Might we have met?
Tiki: ...Alas, no. I'm sorry... You reminded me of someone I knew. But he is gone now. Lost during my endless sleep...
– Chapter 16: Naga's Voice
Lucina's physical appearance includes long blue hair, blue eyes, pale skin, and a slender body figure. Despite her seemingly delicate frame she is no push over and can easily hold her own in a fight or when helping around the camp with the chores. When she first makes her appearance as "Marth" her hair is short and she wears a sort of blue butterfly-shaped mask to hide the Brand of the Exalt on her left eye, a mark held only by those of Ylissean royalty. She also passes herself off as a male to go with her "Marth" persona and confesses to Chrom when he discovers she is a woman after her mask is cut in half that she is surprised he hadn't figured it out sooner.
As I mentioned earlier the way she dresses is reminiscent of Marth (and is actually the exact same as the DLC Marth). Although it isn't really known if she had always dressed like that or if she only wore those clothes to go with her "Marth" persona and it's kinda confusing to figure out (some flashbacks though show she's always worn those clothes so maybe?). Although you can technically change the clothes she wears by way of reclassing, her portrait image will always show her wearing the same clothing, regardless. As such, I will go on to explain a bit about the clothes she wears.
Pr. Marth: My lady, why are we dressed the same?
Lucina: It's...something of a long story, sire. Right now, our blades must do the talking. Draw!
– Versus Pr. Marth (Xenologue: Lost Bloodlines 2)
The most obvious part of her attire is the color. With the exception of the cuffs of her gloves and boots which are white, and the under part of her cloak which is red, it is all blue. The under clothing is a darker blue while the rest of it is a lighter blue. Her tunic has gold colored trim and is sleeveless with the back exposed, which is then covered by a long cloak and held together with a red shield-shaped clasp with a gold colored bird on it.
The boots she wears go halfway up her upper legs and her gloves go halfway up her forearms with the fingers exposed. On her upper arms she wears gold-trimmed shoulder pads and wears a leather strap that runs down from her right shoulder to her left hip and is attached to a silver ring connected to a belt that holds onto the sheath of her sword. To finish off the look she wears a golden tiara, which looks like a headband. And yeah, that's pretty much it.
For those born into the royal family of house Ylisse it is common for them to have a birthmark. This birthmark is called the Brand of the Exalt––or "Brand" for short. This Brand does not appear right after birth, but it can basically be found anywhere on their body when it surfaces. For Chrom it is on his right arm, and Emmeryn it is on her forehead. However, there can be exceptions where the Brand with never surface at all as is the case for Lissa, often causing her to wonder if she is really a member of the royal family and not some bastard child. After meeting her future son, however, she is relieved to know that he possesses the Brand, indicating that she is in fact of royal birth.
As for Lucina her Brand of the Exalt is found on her left eye. When she traveled to the past she wore a mask she received from Gerome to keep it hidden to avoid any suspicion that might arise from it. However, even when her mask is broken no one seems to notice it. Considering though she doesn't stay around long enough for anyone to notice or get very close to anyone it isn't really surprising. When the time comes that she is no longer able to change the past on her own she reveals her true identity to Chrom, telling him only to look into her left eye. With his own daughter having just recently born he recognizes Lucina right away as his daughter who has the Brand on the same eye. From there Lucina cries as she hugs her father tightly.
Chrom: That's the Brand of the Exalt... Lucina... You deserved better from me than one sword in a world full of troubles. I'm sorry.
Lucina: Oh, Father! Father...
– Chapter 13: Of Sacred Blood
How the Brand of the Exalt became a part of the Ylissean royal family was a result of the first Exalt of Ylisse blood-bonding with the Divine Dragon, Naga, in order to defeat the Fell Dragon, Grima, one-thousand years ago. Since then it has become a part of the Ylissean bloodline, serving as a reminder of the deeds shared back then that had saved the world.
Every warrior needs a trusty weapon by their side and Lucina is no exception. Lucina's weapon of choice is swords and the one she is seen using largely resembles Falchion (referred to as Parallel Falchion in the game), the sword that Chrom uses. Originally it was thought to be a separate sword from Chrom's––as there is only one Falchion in existence––but in truth it is actually the exact same sword which was brought back in time from the future. After the death of her father, who was rumored to have been killed by someone he trusted, she inherited Falchion from him, becoming a sort of memento––the only thing she had left to remember him by.
Lucina: Your blade and mine are one, Father. It was... It was all I had left of you.
Chrom: There is only one Falchion, Robin. I believe her.
– Chapter 13: Of Sacred Blood
As for the sword itself there is quite a bit of history behind it. Along with the Shield of Seals––or just Fire Emblem as it is often referred to as––the Falchion was created from the fangs of the Divine Dragon, Naga. It was first weilded by the hero Anri, then Marth, and then by the first exalt who used it to defeat the fallen Earth Dragon, Grima. The sword is something of a royal treasure within the royal family of Ylisse. Although the blade itself is unaffected by the ravages of time the hilt of it has needed to be replaced over the years. As a result the appearance of the sword has changed many times. On the blade there is an inscription that reads as "Sniamer llits erutuf eht tsol si esle lla nehw" which when reversed reads as "When all else is lost the future still remains".
Another thing about Falchion is only members of the Ylissean royal family can wield it, but even then the sword chooses who can use it properly. In her supports, Lucina and her sibling test their compatibility with Falchion by having them swing the sword at a log. If they are able to use it the sword will cleanly cut through it, if not the sword will be dull and unable to cut through it. After a couple of missed attempts they give up and conclude that they cannot use the sword. The sibling then whispers to Falchion and asks that it continue to protect Lucina or else it will be demoted to apple cutter. Later it is revealed that the sibling did in fact cut through the log, although they never learn this. Despite this however none of Lucina's siblings can actually use the sword in the game.
When Lucina escaped to the past through the Outrealm gate, a sort of portal linking worlds, she went under the guise of Marth, but who exactly was he and what significance did he have with Lucina? I've already mentioned him alot throughout this site so it's about time I explain things. Marth is an ancestor of Lucina who existed 2000 years prior to Fire Emblem: Awakening. He was the prince of Altea in Akaneia who defeated the Shadow Dragon Medeus. I don't know much more other than that as the only game I've played with him in it I have never been able to finish as it lacks everything I've adored in a Fire Emblem game. Maybe one day...
Much like how I don't know a lot about Marth the same goes for Lucina. Sure, she's heard tales of his deeds, but nothing of what kind of man he was. In her supports with Tiki, a manakete who lived since before his time, much is learned and perhaps it was no coincidence that she chose to take up his name. Tiki describes Marth as one who treasured his friends and was kind, considerate, calm, and always quick to a smile, despite his station. He was nothing like the man she thought he was. Despite the struggles he went through as he worked toward peace he endured, and what would have killed any other man only made Marth stronger. Because of that he became known as the "Hero-King". Tiki then states that before that he was just an ordinary man and was only able to achieve what he did because of the help he had from his friends and allies.
Lucina: The hero of legend had help?
Tiki: Of course he did! Behind every great man stands a host of friends and comrades. You want to win a war? Then you must learn to inspire warriors and win their trust.
– Lucina and Tiki B Support
Marth and Lucina are very much alike. They are both kind and quick to help others in need. Much like Marth, Lucina does these things without thinking about them; it's who she is. If something needs to be done you can be sure she'll be right there helping out. Because of this Tiki states to Lucina taking up his name was a fateful decision of great import. While she cannot be sure of Lucina's intentions in taking the name she claims the name evokes envy and hope in others and may even burden her with their expectations. Although Lucina is unsure if these expectations will crush her she vows that she will never rest until everyone's dreams have been achieved, indicating that she is on the right path. Together with her friends and comrades, they will defeat Grima and win the war.