Scarlett O'Hara

This is slightly off topic (a good one by the way!), but can anyone explain this being anything other than a supernatural presence:

When I was boarding in a hall of residance (or dorm as you call it in America) which used to be an old maternity hospital, a girl on the 2nd floor woke up one night with a blue girl beside her. She thought at first it was her friend so said hello, and the figure didn't respond, but just glowed and she realised it was not normal so freaked out and ran out of her room screaming. Can you imagine that kind of thing or is it possible it was real? There had been other sightings in past years, repeatedly of a woman ghost who wandered around the stairs from ground to first floor crying out for her baby.

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