15
"Don't you fucking dare drop me," is all you say to Tony when you give his plan the nod. He rolls his eyes at you, but refrains from saying anything in response, which is actually pretty good for Tony Stark.
The first person he carries up is Natasha, dropping her off at the roof's edge to reconnoitre while he fetches you. By the time you arrive on the rooftop, all the agents who were up there are dead and Natasha is standing in the middle of the roof, not a hair out of place.
Tony shakes his head and goes back to grab Steve, but you and Natasha both know he's secretly impressed. He'll never admit it, and you haven't said anything either (you're saving it for a day when he particularly annoys you), but you both know Natasha is more intimidating than a whole host of Iron Man armours.