Although Shin Kibayayashi is the one known for providing the story concept for Fire Emblem Fates, you may be interested to hear that Yukinori Kitajima wrote the third story path titled “Invisible Kingdom”.
Kitajima’s script-writing company previously worked on several other titles, including Ace Attorney: Dual Destinies, Time Travelers, Okamiden, Chaos Rings, 428: In the Blocked City and Professor Layton vs. Ace Attorney, among others. Additionally, Kitajima along with his staff at Synthese are the main scenario writers for the Senran Kagura series. It’s also been revealed through his Twitter account that he and and other Synthese staff wrote the support conversations for the Birthright and Conquest story paths.
(Now that might explain the small amount of innuendo people have been finding in certain parts of the game… XD)
Besides this, you can find a video below showcasing the online battles we talked about in the past.