Hi, it is possible that it is your gaurdian angel or possibly spirit guide. The fact that the dog seems friendly to it, to me, shows its benevolent, for I believe that animal's and childern really pick up on things you cannot see.
I once was touched by a shadow ghost
![[Gasp]](graemlins/eek2.gif)
I was very pregnant and sound asleep. Its touch woke me out of a sound sleep, and I literally jumped out of my very low frame bed, big stomach and all. As I was jumping out of bed I saw the shadow ghost whoooosh into my closet, I saw it had long hair {male or female??} As it went from my bed to the closet it seemed to shrink and then it was gone. I screamed for my daughter who was still up in the living room, yelling there's someone in my room. I had the bathroom light on so thats how I saw the form. As my daughter came in she turned on the lights and there was no one there. I told her what happened and she said right before I screamed the dogs and cat started acting weird. The dogs were growling and they were acting strange, then I screamed. Now in this case, the fact that I felt it touch me and it woke me out of a sound sleep, terrified and the animals were acting strange I feel it may have been manevolent. Not sure though. I've had strange things happen to me throughout my life.
I still think though that your spirit is a good one just because it doesnt scare anyone and the dog seems completely okay with it.
The female you keep seeing, my its a residue haunting. You say you always see her walking past your window towards your door??? I would maybe look into that possibilty.. fascinating though. You should try to catch her on film..