The woman who introduces herself at the beginning
Why do you think she got killed so quickly ? I'll admit I found her incredibly annoying right when she opended her mouth and started talking about her cats and whatever, but between that and voting for her out of spite it's a line to cross.
I think all the others inconsciously preyed on her for showing weakness and revealing so much about herself so quickly, one of the most disgusting death in the circle for sure.