Nothing is known about Kayla's life before or as the outbreak began. She may have lived in or near Ohio.
Kayla is first seen with Sebastian outside the Commonwealth. Their encounter is interrupted by Mercer, who steps in to save them several roamers. Kayla is outrage that Sebastian had Mercer watching him, she runs back to the Commonwealth in anger.
This list shows the victims Kayla has killed:
- Possibly numerous counts of zombies
- "Don't get any ideas. I don't want somebody seeing us"
- —Kayla to Sebastian[src]
Kayla is Sebastian's girlfriend, while the two were having sex, she was outraged when learning he had Mercer watching them. It's implied that Sebastian isn't faithful to her and has numerous other "girlfriends". It can be assumed that she broke up with him before or after he killed Rick.
Kayla seems to have a distaste for Mercer, despite saving her life from zombies. She also views the man as perverted.