Nothing is known about Kayla's life prior to 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 outraged 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, as she sees him as perverted for watching over her and Sebastian getting intimate with each other, despite Mercer only doing so to ensure their safety. She doesn't seem to be grateful in the slightest for Mercer saving their lives.