What gets fat without eating and cries when not sad. What gives birth without concieving and shouts when not mad?

Question

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

Answer 1

Answer: Clouds