Nothing is known about Kaylee's life before or as the outbreak began.
Before the Terminus butchers can slaughter Glenn Rhee, Gareth enters the room and mentions that Kaylee is collecting and counting the shells used in the round-up of Rick Grimes' group. Following the attack on Terminus, Kaylee's status is unknown. It is possible she was killed by the captives or the zombies.
This list shows the victims Kaylee has killed:
- Possibly numerous counts of zombies and unnamed people
- "No Sanctuary" (Mentioned)