from my understanding Before Joining the band of the Faclon Casca used to be a present girl living in a remote mountain village until Griffith saved her from being assaulted by a lustful nobleman. Still, instead of Griffith killing the nobleman he cuts off his ear and gives Casca a sword to finish him off this inspires her to become a formidable fighter, and was second in command before Guts shows up. After Griffiths's treason and capture, She assumed control of the Hawks and Led an escape getting wounded by arrows in the process despite getting wounded she still managed to lead the Hawks but it has been a burden on her since.

Here I redesigned Casca As a wolf in this alternate Zootopian universe because from what I know about furry history, the funny animal comics have been parodying other properties before I was born so I would like to indulge in that too