This information was submitted via email (two separate people). We have included the links we were provided, but if you have additional details please let us know.
According to this site, marrying either with a same-sex avatar can lead the player to permanently lose out on one or two children. Also Rhajat is not automatically unlocked in the game and hence is missable.
LGBTQ references in this game series:
Fire Emblem: Sacred Stones (2004): Joshua and Gerik
Fire Emblem Awakening (2012): Same-Sex Relationship Hack
Fire Emblem Echoes: Shadows of Valentia (2017): Leon
- Fire Emblem Fates. (n.d.). Gamefaqs. Retrieved from http://fireemblem.wikia.com/wiki/Fire_Emblem_Fates
- Is every character bi? (2016). Gamefaqs. Retrieved from https://gamefaqs.gamespot.com/boards/114533-fire-emblem-fates-conquest/73257655
- Niles. (n.d.) Fire Emblem Wiki. Retrieved from http://fireemblem.wikia.com/wiki/Niles
- O’Keeffe, K. (2016, February 22). Nintendo’s New game ‘Fire Emblem: Fates’ is the first to feature queer characters. Mic. Retrieved from https://mic.com/articles/135754/nintendo-s-new-game-fire-emblem-fates-is-the-first-to-feature-queer-characters#.zJOw2IssY
- Rhajat. (n.d.) Fire Emblem Wiki. Retrieved from http://fireemblem.wikia.com/wiki/Rhajat
- There’s bisexual characters in FE Conquest and Birthright? (2016). GameFaqs. Retrieved from https://gamefaqs.gamespot.com/3ds/141838-fire-emblem-fates-birthright/answers/421417-theres-bisexual-characters-in-fe-conquest-and-borthright