No that's not her. Nobody's really officially posted screenshots but I remember the artist posted a teaser for her on their twitter that looked like this. Again, I haven't triggered her myself yet but others who have confirmed that was her when I showed them the image.
An update GREATLY lowered her chances of showing up so it might take some doing if you're unlucky. She'll show up on any night, so you could grind it on the first night if you want to.