"But..." She protests weakly, noticing her blood's getting on his uniform from the way he's holding her.

Natasha knows Steve's in his element now. Protector, fighter, hero. She should just let him do his thing and not worry.

But she can't. Part of her wonders what is so special about a chemical that it can turn Steve Rogers from the fearful little guy he was at the start of this mess, into the man holding her and shielding her from bullets now?

Are they even really the same person?

She doesn't want to think about it.