Three smokelike creatures?

I wish you had gone in to some detail regarding your post,such as is she in a home where their were previous owners,if it isn't then someone could of lived on the land before and has an attachment to the home or land or ped away on the property.Spirits can appear in mists or smoke form or as black figures.Does she notice any temperature drops in the room when these entitiys appear to her,such as cold spots? The first thing paranormal investigators try to do is debunk what is occurring.Spirits often will touch to make themselves known and make the person aware that they are around.What I would suggest is that she try and doent some proof that this occurring,tell her to get a digital camera and snap some photos and get a tape recorder to try and pick up any electronic voice phenomena that may be going on,tell her to run the tape and ask some questions,such as is their spirits present,what are your names and why are you here? This will be the way to see for sure if this is happening.If she has any findings then you will know for sure what she is dealing with,some people will go out and buy sage and burn it to cleanse the home.Others will call on a priest to come and bless the home,some people command the spirits to leave in Jesus Christ's name.I would have her do what I suggested above and if she still has occurrences then come back to this section and share them with all of us paranormal fans and then I will try to help you out more and ist you,you need to have the proof that this is going on and not something with her such as an active imagination.Hope this is of some help to you.