Back on my bullshit once again
She is a PI and while investigating one day, she was caught up in an accident that mutated her and warped her personality. Now lacking no empathy, she continues to investigate crimes but with a more exuberance and lack of care for those around her. Even going as far as to change her name cus thought it as boring. Yet despite this demeanor, she is still manages to maintain her detective work which seemed to actually have improve if anything.