You can equip weapons and armors to enhance the ability of the character.

How to equip your character: First, open your inventory and character status by clicking the buttons "Item" and "Status". Find the weapon you want to arm yourself with and check you fulfil the item requirements. Right-click on it to use if it is applicable or drag it into the equip slot.

How to unequip your character: Open the character status button by clicking on "Status". Double-click on the item you want to remove, and it will be put back into your inventory.