Board Thread:Speculation House/@comment-190.47.114.141-20170910035917/@comment-26397825-20171009025851

Didn't Pyrrha state that the feeling of someone watching you was tied with aura? In the Emerald Forest Pt 1:

Pyrrha (off-screen): Aura is the manifestation of our soul. It bears our burdens and shields our hearts. Have you ever felt you were being watched without knowing that someone was there?

Jaune (off-screen): Uh... yeah.

So it seems that you can train your aura for a 6th sense type of deal relating to danger.