Kathrine's guide to being a vigilante and what not to do

Kathrine is a normal 16 year old, well as normal as she can be. You see Kathrine has a secret, she's the vigilante Artemis but when she's not stopping crime she's a bartender at a very popular bar in the middle districts and when she's not doing that she's hanging out with her adoptive little sister Valentina and their adoptive older brother Alexzander. Life is as good as it can be until one faithful night when Kathrine saved the life of the villain Gaia as Artemis and now she has to deal with the most dangerous villains in the city wanting to pay her back and later trying to kidnap her and her adoptive siblings also there's a new regular at the bar, she's nice but something's off about her and the people she brings in from time to time. Kathrine is sure it's nothing, this totally won't come back to bite her in the ass. This is my first fanfic and I would love some feedback.