Rosie

Rosie is one of the four types of Big Daddies. It carries a rivet gun and throws proximity mines if it's far enough away from you. It has a second form called Elite Rosie. The Elite Rosie has a big, red collar. It is taller but slower than the Bouncer. You have to be a Rosie to be able to get to Fontaine by going around the level and finding parts of the suit.