Two best friends until the end

A young girl age 16 is a demon slayer named Sam she started to kill demons after her mother, aunt, and uncle died fighting a powerful demon and now she is determined to kill every single demon and destroy the one who killed them but on the way she meets different people and a little kitten who is also a demon but turns out to become her very best friend. While she stays with her dad and destroy demons her father true to make her stop killing demons will he succeeded on telling her to stop killing demons read this story and find out. But what if one demon changes that... Please vote and comment for and I will write more thank you.