Koei Tecmo has updated their official Japanese Youtube channel with a new trailer for Fire Emblem Warriors. The latest trailer reveals that Elise will be joining as a playable character in the game. For those who are unaware, Elise made her debut in Fire Emblem Fates. Fire Emblem Warriors will be released for the Nintendo Switch & Nintendo 3DS on September 28 in Japan and worldwide on October 20.
Source: Koei Tecmo Japan