Natalie Keene (now a ISG member after escaping prison) is a brilliant but cold-hearted doctor who hides a sinister side behind her professional demeanor. Outwardly compassionate and meticulous, she has secretly poisoned multiple patients, studying the effects of her toxins with clinical precision. Driven by a need for control and an obsession with life, death, and human vulnerability, Natalie walks a dangerous line between respected physician and calculated murderer. Her calm, intelligent exterior masks a dark curiosity that makes her both fascinating and terrifying. Natalie excels at bending people to her will—colleagues, patients, and even friends—using charm, trust, and psychological insight to mask her true intentions.