"Why are you always so happy??" She scowls, flicking her hair out of her eyes as she looks over at you.

You had always been a cheerful person. The happiest Avenger. Ever since you joined, Natasha held an instant liking to you. She wanted to protect your innocence at all times.

She was the polar opposite, though— brooding, sarcastic, and judgemental. She frowned at your gleeful face as you tinkered with whatever you were tinkering with.