Since I don't have much information on what exactly 'chrom orange' refers to in the context of fanfic, it could be a very niche piece of fan - made literature. It might be that Chrom is a new or relatively unknown character in a particular fandom, and the writer of the fanfic has decided to incorporate the color orange as a symbol, or it could be related to an orange - colored object that is important to Chrom's story in the fanfic. For example, if Chrom is a hero, the orange could be the color of his magic sword or his shield.
There's a fanfic called 'Chrom and Lucina: The Unseen Journey'. This one focuses on their journey together. It shows how they support each other in battles and in making difficult decisions. The author does a great job of creating a believable and immersive world for them.
I'm not sure specifically what the 'chrom best wife story' is. It could be a very personal or a very specific story within a certain community or family that I'm not familiar with.
I haven't heard of any specifically popular 'chrom orange fanfic' stories. It might be a very specific or new concept that hasn't gained widespread popularity yet.
One common theme is their romantic relationship. Writers often explore how they fell in love, the challenges they face as a couple in the game's world, and their future together.
A common characteristic is the exploration of their different social standings. Chrom being a prince or leader, and Cordelia a skilled pegasus knight. Fanfictions might play with how they bridge that gap in their relationship. For example, some might show how they support each other in their respective roles. Another aspect could be the setting. Since they are from a fantasy - like world, fanfictions may expand on the lore of that world and how it impacts their relationship.
One characteristic is the exploration of their deep friendship. In many chrom x robin fanfics, their bond is shown as something that goes beyond just being comrades. For example, they often rely on each other's judgment in battle and in diplomatic matters. Another characteristic is the focus on their complementary personalities. Chrom is often depicted as brave and noble, while Robin is intelligent and strategic, and fanfics play with how these traits interact.
Well - developed characters are essential. The fanfic should stay true to their personalities from the original source. Chrom's bravery and Lucina's precociousness need to be intact. Also, a good plot that ties into the Fire Emblem universe, like dealing with threats to their kingdom, makes for an interesting read.
One great Chrom and Lucina fanfic could be 'A Father's Promise'. It beautifully explores their relationship within the context of the game's lore. Another is 'The Bond of Royals' which focuses on their shared responsibilities as leaders and how that affects their personal bond.