Grants Atk/Res+9. Grants weapon-triangle advantage against and inflicts weapon-triangle disadvantage on red, blue, and green foes during combat. Neutralizes effects that boost values along with weapon-triangle advantage or reduce values along with weapon-triangle disadvantage (Triangle Adept) on unit and foe. At start of combat, if unit's HP ≥ 25%, unit makes a guaranteed follow-up attack during combat.
This skill can only be equipped by its original unit.
See weapon-triangle for more information on weapon triangle advantage effects.
As a general rule, if a unit is both prevented from making, and guaranteed to make a follow-up attack, the effects cancel out, and the Spd difference decides instead (including effects that alter the Spd difference such as Frozen).
A foe with effects such as Phys. Null Follow or Null Follow-Up will neutralize the guaranteed follow-up attack granted by Duality.