Blue Orbs Continue to Float Near Information Windows

The photo stream here shows 9 photos of mysterious orbs hanging out near the information windows at Grand Central Terminal. Now let's see some new examples of this strange phenomenon.

Here from October 26, 2015 is a blue orb who seems to be playing "information clerk."

Here from October 15, 2015 is another blue orb floating near the same window.

Here from October 13, 2015 is another blue orb floating near a different information window.