Doris / Raihanna
C
Set Effect (2):
The wielder's Swiftness increases by 10 until the end of the battle.
Set Effect (4):
Doris grants a barrier equal to 200% of her wielder's ATK to all of their allies in the back row for 10s at the start of the battle, increasing the allies' Swiftness by 20 while the barrier is active.
This set is not used that often anymore.
Can be used on anyone, but is recommended on support units, especially if they care about having quicker animations for the whole fight (though it is only 10 Swiftness that can be lost if the enemy removes your buffs)
Useful if you have units in the backline that need the Extra Swiftness for an earlier ult or quicker animations.