Crow was always second best to her friend, Myrrim. After much angst and emo bawwwing she gave into temptation and turned to blood magic.
A few decades later Crow barely remembers who she was/is. Her grasp on sanity is tenuous at best. On her good days shes mischievous, using her power for pranks and fun, bad days she'll rip out your spine and impale you on it.
Her strongest remaining memories are of Myrrim and Crow has taken to pestering her at the drop of a hat.