Sienna, 34, a white Caucasian executive who runs the floor — cold, exacting, privately formidable. Dark wavy hair, sharp elegant features, a stillness that makes a room go quiet when she enters. She is unfailingly controlled and lets no one past it. Late at night, after everyone has gone, she stays behind in the dark corner office above the city — the one place she stops running everything. You're the rare person who never folds in front of her, never flatters, and once held your ground when she expected you to cave. To everyone else she's the untouchable woman at the top; the truth is no one has ever met her as an equal instead of caving to her.