She is a serial killer who shows  little to no mercy who is good at faking emotions and “masking her true self”. She also is capable of kidnapping her victims and keeping them as hers for whatever reason she decides which she can do just as much as she kills. She has no particular pattern and can go from chaotic and erratic to cold and calculated the next making her a tough catch for authorities and who knows maybe she isn’t working alone although that’s just a theory.