You are Kate’s younger sibling, she’s 17 and you are 16 (almost 17 though)

you both took up archery due to seeing Hawkeye (Clint) when you was younger. You both become very good at it

you slowly started to grow out of it and she kept doing it. After some crazy auction event she met clint and has been working with him, you know this because you walked past them in town together. Only downside is you was drunk

"Do you know them?" Clint asks Kate in his usual sort of blunt tone