Her ability was to be totally impossible to perceive. After receiving that power, she had briefly tested it out. Stealing things was simple. She could take fruit from a street stall and eat it in front of the owner without being noticed. He hadn’t even noticed anything was missing until after Tracy had left, putting him outside the range of her ability. Money and valuables were similarly easy to take. She had already accumulated a fortune. Even if she were to lose this power, she would have enough wealth to take it easy for the rest of her life.

Killing people was simple enough as well. A little while ago, she had attacked a party of adventurers that had taken a quest she had planned on doing herself. She slaughtered them effortlessly. After all, they couldn’t even tell she was there. Even when she meticulously dug one of their hearts out of their chest and slashed open their throat, the others didn’t even realize what had happened. Of course, when one of their companions was suddenly dead, they realized they had been attacked by something, but they never knew it had been Tracy. Understanding they were under attack by something invisible merely threw them into a panic. In the end, they had no way of fighting back against her.

So she had learned she could attack others unilaterally. However, there was always the possibility of one of her targets being able to fight back with indiscriminate attacks. Even if they didn’t know where she was, if they scattered attacks around them, there was a chance they would hit her. But her power had already taken that into consideration. While it was active, her body was moved into something like a subspace, allowing her to pass through any attack unharmed, while anything she did would still have an effect on her targets.

Her power was truly invincible. With it, killing Yogiri would be easy. At least, after observing him for a while, that was what she decided. While his instant death ability was certainly terrifying, it required him to notice his opponent for him to activate it.

Having let his guard down after killing Zero, Tracy approached Yogiri from behind.

-Volume 7 pages 105 and 106