Chromia

Chromia is the het ship between Chrom and Sumia from the Fire Emblem fandom.

Canon
Chrom and Sumia are both members of the Shepherds. Sumia is first introduced in Chapter 2 when Lissa brings Robin to the Shepherds barracks. When she approaches Chrom she promptly trips, leaving her embarrassed. While the Shepards plan to march to Ferox, Sumia worries that she's ready for a battle yet, so Chrom tells Sumia to stay behind and watch and learn.

After defeating the Risen at Northroad, Chrom finds a wild pegasus who only settles once Sumia appears to calm them. Later, at The Longfort, Sumia rides the pegasus and saves Chrom from being hit by multiple Javelins. Robin becomes inspired by Chrom and Sumia riding together to create the Pair Up strategy.

When Chrom is beside himself with worry over Emmeryn's meeting in Plegia, Sumia tries to snap him out of it. Remembering advice from Philia, Sumia punches Chrom in the face. While the hit manages to snap Chrom back to his senses, Chrom is left slightly dazed. Lissa reveals to Sumia that normally people slap people in the face to snap people out, much to Sumia's embarrassment.

Should Chrom marry Sumia at the end of Chapter 11, Sumia becomes the new Queen of Ylisse, giving birth to Lucina two years afterwards and Cynthia shortly after that.

Sumia and Chrom share many traits in common. They can both be clumsy; while Sumia is notoriously clumsy, Chrom tripped over a pebble in their c-support. In their supports, Sumia bakes him rhubarb-and-fiddlehead pie.

Fanon
Chrom and Sumia is one of the most popular Awakening ships in the possibilities of canon since they are shown with a child in the opening animation. Additionally, if Chrom is not married after defeating Gangrel, he will need to automatically marry someone. If all of his possible love interests have the same amount of affection, Sumia will be the first one he marries as long as she is not otherwise married, unless Olivia has 7 or more points in which case she automatically wins.

Despite Chrom being told, by a thousand years dragon, Tiki, that he is very different from his famous ancestral Marth, the protagonist of the first game of the franchise with whose she had close bond; some fans of the ship see that Sumia and Chrom could be a reference to Marth and Caeda, as Marth is the blue haired Lord whom Chrom descends, and Sumia is a Pegasus knight like his wife Caeda.

There is some occasional friction with Chrobin 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.

On AO3 it is the third most written ship for Chrom and the most written for Sumia. It is the sixth most written ship in the Fire Emblem: Awakening tag.

Fandom

 * Chrom/Sumia on FanFiction.Net

Trivia

 * If they are married, their daughters will be Cynthia and Lucina
 * Sumia calls him "Captain" since he is the leader of the Shepards
 * The scene in which Sumia punched Chrom, is called "lovebirds" in one of the localizations.