Caitlyn Wonka, Daughter of the famous Willy Wonka lived most of her childhood life working inside her father's chocolate factory and helped keep the machinery up and running. Upon reaching the age of sixteen, her father had given her a job as a "Wonka Guard" to prevent intruders from getting into her father's factory and also to stop hostages from stealing equipment and escaping. She has gained her gun skills over 5 years of being a wonka factory guard, skills such as headshot and Ace in the hole.
Upon reaching the age 27 she quit her job and became a detective for Piltover city. Caitlyn discovered her natural gift for shooting down chocolate thieves when, at age 17, she had shot her first intruder. She also had a habbit of sneaking out of her bedroom at night and "binge eating" on her fathers chocolate. Infact, she even had her own secret stash which was unknowingly at that time drugged with a growth steroid. It's because of this very reason she became a "Wonka Guard" and then later "Detective of Piltover". This also explains her freakishly tall height.
Caitlyn quickly gained notoriety, both because she was single-handedly defeating crime in Piltover and also because she had developed hunting skills. She never backed down from a hunt or a challenge, and she was one of the sharpest shots in the city-state. She accepted chocolate as payment for her work, and always tracked down theives. Every burgelery case she took on would be closed successfully with the thieves tracked down and caught.
"Did i fire six shots, or was it only five? Do you feel lucky punk?."― movie, quote inspired by her favourite