Thread:Nivaans/@comment-5707992-20150222205719/@comment-25993554-20150222222711

Thats a really good point. Some people say that the "forever 0" might be more than a gag, but a code instead. She could be a prototype.

Well, from what I got, Nagisa is the student with the fiercest bloodlust.

If she wanted to keep her own bloodlust concealed, Nagisa was the best one for the task.

Given how low key she is, if she went to a place with Korosensei alone, he'd notice the bloodlust emanating from her. But on this case, if he felt anything, he would assume it was coming from Nagisa.