Even before coming here, Natasha had trusted Barnes at her back once. She's had a little more practice since then, even had the time to get used to living with him on the station and on missions.

A different version of him, but still him.

She trusts him to watch her back now, focusing on the monsters in front of her, jabbing first one in the throat with her baton, then spinning to whip her weapon around on the other, cracking it across the nose and earning a yelp of pain.