There's two potential jobs I could see her doing.<br/><br/>One thing, she could be a non-obvious bodyguard.  This is what I plan to have Natasha do, and I think you could do it, too.  She'll pretend that she's an old friend, or an assistant or something.  Then, when badguys attack, suddenly additional guns!  Oh no!<br/><br/>Another good job would be outer perimeter security.  You wouldn't be hanging out next to the target.  Instead, you'll be sticking around the area, trying to stay inconspicuous, and spot potential threats before they get to the target.  Your stealth should let you get the jump on people pretty easily.<br/><br/>Just some ideas.