Jeannine Ryan is a statistician.
She is not a covert operative. She has no desire to be one. She certainly has no training to be one.
She does, however, have a considerable amount of brain power. And a keen analytical mind. And a stubborn tenacity that will not let her step away from the truth and quite often that can get someone killed.
When we initially meet Ryan in her first recorded adventure, she is a graduate student nearing the end of her goal of a Ph.d. Getting that final academic hurdle behind her is her goal but the journey is something she is greatly enjoying. This very attractive red-haired number-cruncher loves a challenge but she is looking for them in the data she is studying - not in dodging killers and bullets and people who would rather see her dead than reveal hidden truths.
As her career progresses, she continues to get involved in matters taking place in the real world which consistently work to getting her killed.