Windcutter

Flora (the Organization's former No. 8) is the creator of this technique, earning her the title "Windcutter Flora."

After the seven-year timeskip, Clare (the Organization's former No. 47), in memory of Flora, was shown to have mastered the technique, using it effectively during her battle with Agatha.

Usage
The Windcutter is a lightning-fast slashing attack, similar to the Quicksword, that involves drawing, swinging, and resheathing the sword in the blink of an eye. It is shown to be very accurate and fundamentally does not require any yoki to execute. This allows the user to perform it continuously without tiring and with a minimal number of unnecessary movements. However, the user can augment the speed and power of the technique by releasing yoki if she so wishes.

After the Northern Campaign, the Seven Ghosts were forced to suppress their yoki auras. Since the Quicksword uses yoki, Clare was forced to seal away the technique. As a solution, as well as in honor of her former captain, Clare began to use the Windcutter and eventually mastered it.

Comparison between the Windcutter and the Quicksword
After the first skirmish in Pieta, Flora challenged Clare to a quick duel in order to test her Windcutter against the latter's Quicksword. After the duel, it was determined that Flora's Windcutter was slower, but had more precision than Clare's Quicksword. After the confrontation, Flora surrendered the title of "Fastest Sword Among The Claymores" to Clare.

Though the Windcutter is a "split-second" slower, the Windcutter could be considered superior to the Quicksword. Management of control and precision enables the user to control their Yoki level of release which hinders the opposition from sword movements.

Yoki Suppression enables the user to feel less tension when delivering their next movement. Despite the swiftness of the base speed to begin with, releasing Yoki could increase the base speed to a point where it could potentially match or even exceed the Quicksword's. Though it should be noted, it could impact on its exactitude.