The overarching story follows the protagonist, a customizable avatar named Corrin by default, as they are unwillingly drawn into a war between the kingdoms of Hoshido, their birthplace, and Nohr, their adopted home, and must choose which side to support.
Azura, known in Japan as Aqua (アクア, Akua), is a member of the Nohrian royal family who Hoshido kidnapped as part of their efforts to rescue Corrin.
Birthright and Conquest end with her disappearance after expending her power to weaken the villainous King Garon and enable Corrin to defeat him.
The plot of Revelation reveals that Azura was the princess of the invisible land of Valla before the king was murdered by the mad dragon Anankos.
Rhajat, known in Japan as Syalla (シャラ, Shara), is the child of Hayato, a member of the Wind Tribe, and a diviner specializing in dark arts.
The main characters from the Nohrian kingdom include Corrin's guardian, Gunter, and their adoptive siblings Xander, Camilla, Leo, and Elise.
Patricia Hernandez of Kotaku noted that both her personality and appearance were "sexualized", while Gita Jackson of the same publication described her clothes as making her resemble a dominatrix, saying that "every time you think it’s going to do something sensible, it defies expectations".
The Western localization presents her as unambiguously lesbian, but her sexuality is more ambiguous in the Japanese version, and she is unable to marry other women.
[21] Niles, known in Japan as Zero (ゼロ), is an outlaw who has the personal skill to capture enemy units and recruit them into the player's army.
[25] While Fates was the first game in the series to introduce same-sex romantic support conversations, an aspect that was called "groundbreaking",[17] its depiction of bisexuality was also criticized.
Additionally, both characters, Niles and Rhajat, are shown as morally ambiguous, exhibiting sadistic and stalker-like behavior, respectively, reinforcing the negative stereotype that those attracted to multiple genders are "depraved".
"Silly" dialog was added to several characters - Corrin's child, Kana, was made to "speak dragon" by roaring even while in human form, referencing an Internet meme, and talks in a more childish manner.
In some cases, the characters' dialog and behavior were also censored - an entire conversation between two ninja, Saizo and Beruka, about assassination was replaced with ellipsis.
[21] A "petting" minigame in which Corrin could increase their bonds with other members of the army by inviting them to their quarters and touching them via the touchscreen was made inaccessible by players for the Western release, although Nintendo stated they did not consider it inappropriate within Japan.