In Fort Jinya, you'll meet Hana and Tsubaki while tending the wounded with Sakura. Not long after, the fort will be surrounded by Nohrian soldiers. Sakura’s retainers will aid you in this battle. Tsubaki is a Sky knight, a versatile mounted unit that has good movement range and defense. Hana is a samurai with high speed with good offensive abilities.
In this map, there will locked chests where you need Kaze’s innate unlocking skill to open. There are also two dragon vein locations which will reveal a large healing area to your advantage.
To start off, move Kaze to the first chest to the right (contains Seraph Robe) then move your avatar to the first dragon vein to the left. Move your characters towards that location as well. Next, activate the Dragon Vein and loot the chest. Head south to the fort's entrance then move your characters to the left and engage the remaining enemies there. You'll meet Silas, the avatar's childhood friend. He'll later join the army to support the avatar.