Fan Casting Sandy Clark in Zack Snyder's Rainbow Six

A pediatric doctor who built a research department from scratch to save one child from a disease that ages him eight times faster than normal. She stitches John's wounds with one hand and calls him on his "Excessive Control Disorder" with the other. Kidnapped by Brightling to be used as insurance, she smashes through one-way mirrors and tells eco-fascists to "fuck off" rather than wait for rescue. The only person on Earth who can make John Clark laugh, and the only thing he's afraid to lose.