Originally Posted by Cornchips:
“He may have wanted to vote for her. As a BB fan maybe he wanted to vote for the radar didger. I probably would if I was in there. He managed to get a reaction from her didn't he? It's more than we have had thus far outside of a task.”
Nick probably has no idea that Chloe is a radar dodger though. It's very difficult for the HM's to know how they're being perceived until they get outside info from BB.
Chloe doesn't appear to be shy or particularly quiet either from the little bits of her that I've seen. It's just that the producers have prioritised others above her...