The following comes from a Nintendo Dream interview with Fire Emblem Warriors producer Yosuke Hayashi and director Hiroya Usuda, as translated by NintendoEverything.

- Coliseum mode will focus on replayability, and will have "fun battles and gameplay with large-scale special rules"

- more info coming on Coliseum Mode at a later date

- the twins have swords because the devs want people to learn the weapon triangle, plus swords fit well with the characters' lineage

- Chrom was the first character created

- Lissa was given an axe due to a lack of axe characters, and Lissa can use an axe if promoted to War Cleric in other games

- the team considered removing Lucina from the roster, but after talking to Nintendo, they realized how important she was

- Robin is outside of the weapon triangle due to using a book as a weapon

- Frederick was also given an axe due to the same reasoning as Lissa

- voice actors asked to record lines multiple times to make sure they nailed their delivery

- voice acting also includes lines/homages to classic lines from previous entries

- many more characters are yet to be revealed