|Portrayed by||Lisa Joyce|
|First appearance||"The Siege"|
|Last appearance||"The Fall"|
|Also known as||The Infiltrator|
|Affiliation||The Followers (Pre-2013)|
Ava Marsden was a Follower within the state police.
In The Siege, Ava is first shown with Mike helping him uncover a footage of a gas station that Paul was at to find his location. She later was seen driving out to the house Joey was at with Mike and helped surround the home. In The Fall, Ava reveals her true nature when she and Mike hold up Emma and Ava shoots Mike in the chest, hitting his body armor. She tells Emma she works for Roderick and gets them to a car to drive away. She is later shot and killed by Ryan.
- 2013: The siege at the farmhouse: