User blog comment:Lifebleedin/how does killua know zenos ability/@comment-24461729-20140124141336/@comment-48285-20140124164356

"Now can normal people sense "aura"? if u remember in tht filler episode where gon or someone mentioned tht people unknowingly leak out nen even if they have not awakened it....(The episode where zepile makes something while not knowing anything about nen)"

Two things: 1. I don't think that was a filler episode. 2. That answer has nothing to do with the question.