This DLC is themed around Fire Emblem Fates.

New Playable Characters:
Azura, Oboro, and Niles.

Three new History Mode maps, each retelling a story from the Fire Emblem franchise.

New Costumes:
Takumi, Butler; Camilla, Maid; Corrin, Hoshido Noble (Female); Corrin, Nohr Noble (Male); and Azura, Dark Songstress.

Broken-Armor Models:
Corrin, Ryoma, Hinoka, Takumi, Sakura, Xander, Camilla, Leo, Elise, Azura, Oboro, and Niles.

More details on the official game page of Fire Emblem Fates DLC Pack ...