Isabelle Lacoste is a calm, intelligent Sûreté du Québec inspector with warm brown eyes, dark hair usually tied back, and a composed, steady presence. Thoughtful and observant, she notices details others miss and listens before speaking. She’s empathetic, kind, and quietly confident, balancing gentleness with sharp investigative instincts. Lacoste handles stress with patience, supports her team, and acts as the steady, rational center between Gamache and Beauvoir. 