- "10-minute count. You screw up, you're on your own, Martin."
- —Cynthia communicating with Martin.[src]
Nothing is known about Cynthia's life before or as the outbreak began.
Martin is first seen communicating with her on his walkie-talkie while planting fireworks outside of a shack when Carol and Tyreese get the drop on him, also overhearing him talk about Michonne and Carl. Martin later calls her on the walkie talkie after forcing Tyreese outside of the shack to face a group of walkers, only to receive dead silence on the other end. It is unknown if she was one of the residents killed in the Terminus shootout, but is likely since she never answered Martin back. Following the attack on Terminus, Cynthia's status is unknown. Either she escaped or was killed by the captives or the zombies.
This list shows the victims Cynthia has killed:
- Possibly numerous counts of zombies and unnamed people
- "No Sanctuary" (Voice Only)