Chrobin

Chrobin is the non-binary ship between Chrom and Robin from the Fire Emblem fandom.

Canon
Before the game begins, the player must choose if Robin is male or female. Robin will be playing a secondary role to the game, alongside Lucina, behind the lead character, Chrom. If Robin is male, the two cannot marry.

The game begins with a vision. Robin and Chrom are fighting Validar, and after a grueling fight, they seemingly succeed in killing him. Chrom turns his attention toward Robin, but while his back is turned, Validar strikes, shooting a bolt of magic out. Robin pushes Chrom out of the way and takes the hit. Chrom rushes to their side, but their vision begins to pulse. As their sight turns red, they stab Chrom's chest, and he crumples to the ground. Even dying, Chrom reassures Robin that this is not their fault.

Robin wakes up in a field, two faces looming above them. Lissa and Chrom are debating what to do. When they realize that Robin is awake, Chrom helps them up and says, "there're better places to take a nap than on the ground, you know." Robin thanks Chrom, who is surprised that they know his name, especially since they have amnesia and they don't even know their own name.

Frederick, wary as ever, expresses doubt: there is a good chance Robin is a Plegian spy. However, Chrom remains friendly, and the three Shepards offer to help Robin back to the nearest village. As they go along, the group notices a plume of smoke and realizes the town is being attacked by brigands. Chrom, Lissa, and Frederick rush to help, leaving Robin behind. Robin chases after them a little bit later, and jumps in to help. During this battle, Chrom places his trust in Robin; afterwards, Robin tags along with Chrom and his group.

They build a camp and settle down for the night. For dinner, they are having bear meat, much to Frederick and Lissa's distastes. However, both Chrom and Robin devour it. During the night, Chrom and Lissa leave camp, but they encounter a portal opening, which Risen fall from. "Marth" saves Lissa's life, and Robin and Frederick arrive soon after to help. They eventually discover that Marth is actually their daughter who time traveled from the future, Lucina, and that they were married and had another child, a young man named Morgan. In this timeline, they marry too, making Robin the queen of Ylisse through her marriage with Chrom.

Robin gets a revelation that she is actually daughter of the king of the bordering kingdom that they are at war, Validar, and that she was born to be the vessel of the Grima, the dragon who would bring destruction to the world. Despite that, Chrom assures her that he will stay by her side a d that in this timeline things would be different. With that in mind, they fight side by side to change fate togehter.

At the end of the game, the Shepards learn that Grima can either be put into a long slumber if Chrom strikes the final blow, or be truly defeated if it kills itself. Since Robin is, in a sense, Grima, they can strike the final blow to finish off Grima once and for all. However, this will kill them in the process.

If the player allows Chrom to land the final blow, Grima is put into a deep slumber. Chrom tells Robin that they made the right choice, and that all their friends agree.

If the player chooses to land the final blow rather than Chrom, Robin will die. However, Naga tells the Shepards that if their bonds are strong enough, Robin may return. In a scene reminiscent of the beginning, Chrom and Lissa find Robin in a field. Chrom helps Robin up, just as before, and says, "there're better places to take a nap than on the ground, you know."

Fanon
Chrobin is popular due to the close bond between them no matter the player's gender. Even if they don't marry, their close bonds of friendship and camaraderie are evident throughout the story. The fact that the cutscenes between Chrom, Lucina and Robin change if they marry is one of the reasons that players feel compelled to pair them together.

There is some occasional friction with Chromia and Chrolivia shippers, largely due to the game system of multiple canon endings and arguments over which is 'most canon' or 'most deserving' of being canon.

The ship's fandom has also had friction amongst itself, due to arguments over whether slash!Chrombin or het!Chrombin is "better". A good number of prolific slash!Chrombin fans have been known to bash the female Robin.

On AO3, it is the most written ship within the Fire Emblem: Awakening fandom and one of the most popular ships of the franchise.

Fandom
FAN FICTION
 * Chrom/Robin tag on FanFiction.Net
 * Robin/Chrom tag on FanFiction.Net
 * Robin/Chrom tag on FanFiction.Net
 * Robin/Chrom tag on FanFiction.Net

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Trivia

 * Marrying Chrom is the only way for female Robin to have two children: Lucina and Morgan.
 * Chrom and Robin "pair up" in Super Smash Bros. for Robin's final smash.
 * Lucina will not be able to kill female Robin if she is her mother, even after learning she is the fell vessel. If Robin is not Lucina's mother, the dialogue is different, and Chrom stops Lucina instead. Unless Robin is Lucina’s husband in which case, she cannot kill him either.
 * Male Robin and Chrom got a duo alt in Heroes Valetine's banner.