Natasha, when...
....she gets a compliment⊱⊰
Much, pretty much nothing, hit the closest, Natasha did not tell about her former life, except that she was in the KGB and made mistakes, but she never made a secret of it.
Nevertheless, Natasha was a good friend who could be counted on at any time and without exception. No matter what there was, you could always turn to the agent.
"I owe you one," you said, after Natasha had bailed you out over some missing information that wasn't exactly insignificant, "Ten minutes later and it would have been a disaster. The Internet isn't what it used to be either."
"No don't," the Russian replied, waving it off directly, "What are friends for?"
"Thanks. I'll still return the favor someday," you exhaled in relief and began changing the map on the 3D board, "If any of us are good, it's you."