Chrolly

Chrolly is the het ship between Chrom and Sully from the Fire Emblem fandom.

Canon
Chrom and Sully are childhood friends. She is a tomboy cavalier, member from a noble family that served Ylisse as knights during generations, and Chrom is the prince of Ylisse and eventual Exalt.

In their childhood they played together with sticks, swords and used to sneak out of town to climb trees. Both remember the old days as being good times. As adults, they use to train together and see each other as evenly matched. Chrom eventually confess to Sully that he is the only woman that he feels comfortable doing certain things like training and admiting his weaknesses. He also comforts Sully when she is insecure about not being girly like other ladies saying that she is perfect and that she shouldn't ever change.

Eventually Chrom says to Sully that she is his anchor, which results on her bluntly asking him out and questioning if he likes her just as a friend or a if he sees her as a woman. The conversation ends with Sully making a marriage proposal in which Chrom accepts and gives Sully his family ring as an engagement gift.

Two years after the war against Grangel was won, Sully marries Chrom and becames queen of Ylisse, and together they have two daughters: Lucina and Kjelle. Lucina time travels after an apocaliptic future in which Chrom, Sully and all the shepherds are killed, resulting on the kindgom of Ylisse being also destroyed. Sully finds Chrom hugging Lucina and gets furious thinking the young girl is the king's lover, to the point that she consider piercing both with her sword. After some sceptical moments, she quickly realizes that the one that her husband is holding is their daugther from the future after she recognizes the eye mark which only her newborn have. She possibily also encounter her other daughter Kjelle who time traveled together with her older sister, and together they decide to fight to change the future and save their kingdom.

Fanon
Sully is mostly accepted as one of the better, if not the best romantic conversation of Chrom, this happen because he is portrayed as being oblivous to love and a bit awkward with girls and his conversation with Sully flows naturally. However, she has gameplay disvantage because she can't access the powerful galeforce skill, while all other mothers of Lucina have this hability to pass to their children.

For this reason, Sully and Chrom is less popular than Chrobin, Chrolivia and Chromia, being in a steady 4th place of Chrom's most popular pairing.

In fanfictions, the distaste of Sully for girly things is often used to explain Lucina being a fashion disaster, since Sully isn't interested in fashion and this characteristic would be passed to her daughters.

Trivia

 * Sully is the first love interest of Chrom to be introduced in the game.