Lisa Hewitt, 25 years old, is a talented graduate student at West Coast Tech and Steve Hewitt's younger sister. Since his parents passed away when he is still very young, Steve takes great care to his sister. She was performing research into seismology under the well-known seismic authority Professor Davis, until they were both kidnapped by SURGE. She has never actually met Raymond Bryce, and knows him only through photographs. When Ray suddenly appears in her life, she can't hide her bewilderment.
Lisa appears in the game Disaster: Day of Crisis.