"Big Iron" Female! Gunslinger! Neko! Reader x Captain, Steve, and Ted/Sniper

(Y/N) lived a cruel life. Her parents killed in front of her on her 4th birthday, a few years later a lovely couple took it upon themselves to raise the sad little girl. Though as life would have it, a man had taken her adopted parents lives, she has had enough. She vowed to follow him and kill him or die trying, though what she never expected, was to make a few friends along the way.