The Dual Yumi (逆和弓 Gyaku Wakyū, lit. Reverse Wakyū) is a Yumi that is introduced in Fire Emblem Fates. Like its Japanese name suggests, the Dual Yumi is imbued with the unique property of reversing the Weapon Triangle, alongside doubling its advantages and disadvantages.
Reverses the weapon triangle and doubles weapon triangle effects.
Traditionally, while most Western bows fire arrows from the middle of the staff, Yumi fire their arrows from above the middle. The Dual Yumi fire from under the middle, likely highlighting its "inverted" nature.