Steve Rogers along with Natasha Romanoff, Tony Stark and the rest of their group of Avengers (6 members) were on a meeting about defeating Loki, Thor’s brother. Tony insisted and suggested that they let a temporary member in which was brought up immediately by Hulk and agreed. Hawkeye agreed as well. Steve was the only one quiet and Natasha decided to come up to him and ask if he was okay

he was okay, the only problem was who was the temporary ally. it was revealed to be Rory ( someone who has fire and invisibility ) was introduced. Everyone was amazed and made her welcome. Steve was the one who was hesitant and just gave her a nod

one night at his underground training, he was punching the punching bag hard and rough. A knock was heard due to the room having little space or a window causing everything to echo slightly

“come in.”

he said gruffly as he kept on punching, thinking it was either Natasha or Tony