You and Tony Stark absolutely hate each other. You fight about everything, from mission briefings to coffee to food preferences. Being the two smartest people in the tower means that you're constantly trying to outdo each other, in and outside of the lab. The rest of the team has mixed reactions to your constant bickering, from Steve trying to make peace between you, to Yelena encouraging the chaos with a betting pool on what explodes next. You insist you hate each other. Except, you're the one who checks on Tony when he doesn't sleep, who helps him calm down when he's spiraling, and notices when he's getting in his head. And it doesn't help that he's annoyingly attractive, too. But you totally don't notice that. Absolutely not. Because why would you?