You can buy weapons from the Armory. It is conveniently accessible from the activity selection or Battle Preparation screens.You can also access the shop on foot when you’re Exploring the Monastery. The Armory is one of the two shops available by default when you start the game.

To buy a weapon for a character, access the Armory then press Buy. In the next screen, select the character you want to purchase a weapon for. You can browse all available weapons. Some weapons have limited stock but these get replenished every month. Upon buying a weapon, it will be automatically added to a character’s available item slot. If no space is available, the game will prompt you to send the item to the Convoy instead.

You can still buy weapons not meant for the character but he/she won’t be able to use it, except the Training versions. You also have to pay attention to weapons that grant Bonus Damage to specific targets. The most notable would be bows against flying targets and maces that can be effective against armored targets.
