WELL Natasha was raised in Russia which semi-regularly included being abandoned in the snow and having to survive for weeks. So, you know, if he needs tips or advice on surviving in the stupid-fucking-cold, Nat can definitely help. It'll be just like the camping trips when she was a kid, except hopefully with less dying.

She could also maybe ping as someone that could use some help, if you think he'd pick up on and/or respond to people who are Having Trouble Adjusting.

And while she's not bubbly, she might try to encourage him to be slightly more social. Or at least impose her presence on him. If she was in higher spirits she might playfully harass him, but she's pretty much all maladjusted soldier atm.