Chrobin

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

Canon
The game begins with a vision. Robin and Chrom are fighting Validar, and after a grueling fight, they succeed in seemingly 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 they know his name, especially since, with their amnesia, 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 they offer to help Robin back to the nearest village. As they go along, they notice a plume of smoke and realize 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.

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 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 largely 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.

On AO3, it is the most written ship in the Fire Emblem fandom.

Fandom
AO3

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Trivia

 * Marrying Chrom is the only was for female Robin to have two children: Lucina and Morgan
 * Chrom and Robin "pair up" in Super Smash Bros. for Robin's final smash