So one day me and my girlfriend were walking to work when I saw a person shaped mist on part of the road ahead. When I saw it I instantly had every hair stand on end so I crossed the street and kept staring at it. As I got closer the mist got denser until it materialized into a person. It seemed to be on the phone but listing To the convo (I was on complete guard so all my senses were going off yes I listened) she literally repeated a phrase that made no sense then laughed over and over without skipping a beat almost as if it wants people to think it’s human. We have encountered the same female over and over since then and each time she’s never there until she is (the most thing only happened the first time) and if we ignore it for a couple of seconds and turn back towards it, it will be gone even if there is nowhere for it to go. What is it and am I in danger?