Of course she knew why he disappeared. Culpability and shame. Killing SHIELD agents -friends- and letting a demiGod using magic tricks to control you didn’t help for the self-esteem. Loneliness has always been a soothing companion for people doing their kind of job, so he decided to embrace it for a while. More a need than a choice, and Natasha perfectly understood that. Though, the understanding didn’t make it easier for her to handle.
“To successfully make a shot, you gotta follow and master basic steps. Your stance is the foundation. Where you draw your strength. Nock the arrow and grip. Realize you are wielding a weapon. Mindset. Focus solely on your goal, regardless of your surroundings. Be in the now. Set up and draw. Inhale and prepare for what you are about to do. Anchor and hold. There is no going back. Aim. All that remains is you and your target. Release and follow through. Master those and you hit every time. One last step. Feedback. Basically…take responsibility for the outcome. For every shot.”
-I don’t want to go on mission with him anymore, Sir. -After just your first mission together? -It didn’t work. Incompatibility. -And what is the problem with Agent Barton, Agent Romanoff? -… He makes me laugh.