Concealing Movements
In a similar fashion to when John snuck up on the Blood Tiger, he was approaching the Vice-Sect Leader in the same manner.
Such an approach would never work in true battle, but John was testing out his theory right now.
'My aura is a natural extension of myself, in the non-physical form. When I prepared to move a body part, or unleash a battle art, I subconsciously gave away hints in my aura. The aura flaring from that limb about to move would slightly increase in preparation, or traces of my battle arts would leak out before I used them.'
After coming to this conclusion, John had decided to withdraw his aura completely into himself. He approached the Vice-Sect Leader slowly, who stood there with an amused expression on her face.
However, she made no movements, and allowed John to approach.