The Broken Watch

The Broken Watch (고장난 시계, Gojangnan Sigye) is a special ability of Aria which allows Aria to alter one of Tower's Rules in which "everyone must perceive time in the same way". This ability activates as soon as her left arm is attacked, and allows Aria to distort the perception of time for people around her. This distortion is powerful enough to affect White and confuse him for a brief moments and it allowed her to avoid Arie Swordsmanship because the sword attack was a couple of seconds late.

This ability was very effective only at the beginning of a fight because it has an element of surprise and can catch enemy off guard. However, when Slayer White was able to analyze this technique and quickly adjust his attack to normal, White has proven that Broken Watch's ability has flaws and not always reliable.

Regeneration: Aria is able to only regenerate her left arm, which is where The Broken Watch is located.

History
As an attempt to break the Tower's Rules, The Workshop conducted various experiments on Tower's residents and they managed to "create" beings with one specific, special ability. When Aria was created, she was born with The Broken Watch ability.

A Dark Twist
In the Battle of The Nest, Baam encounter White and Aria who tried to kill him during the Gakja Dosaeng game. Aria eventually changed her mind and choose to side with Baam to fight White after she realized that Baam can break Spells.