Quicksword

The Quick Sword (also called Flash Sword) is the signature technique of the Organization's former No.2 Irene. This is performed by releasing excessive Yoki in one arm so that the strength and the speed strongly increase there. Irene (and eventually Clare) mastered this technique to such a level that he strikes couldn't be tracked with the naked eye.

Irene described it as Awakening one arm alone. Because of the chaotic nature of Awakening, a massive amount of concentration is required to maintain control over the appendage and to keep the user from fully Awakening. Especially given the natural instinct to release yoki throughout the entire body, Irene stressed this while training Clare.

It is first seen at the execution of Teresa (vs. Priscilla, Irene, Noel, Sophia). After the fight between Ophelia and Clare, Irene intervened and saved Clare. Later Irene taught Clare this technique so she could remain formitable after losing her sword arm.