|Family||Maxine Seagrave † (daughter)|
|First Appearance||"Let the Games Begin"|
|Last Appearance||"Let the Games Begin" (Alive)|
"Speak of the Devil" (Corpse)
|Cause of Death||Drowned|
|Series lifespan||"Let the Games Begin" to "Imperfect Circles"|
|Agatha was left to drown|
|Agatha Seagrave Gallery|
Agatha was previously named Claire, and attended Chester's Mill High School. She dropped out when she became pregnant with her daughter, Maxine, and changed her name to Agatha. Agatha prostituted herself to get by and raise Maxine. She became privy to her daughter's illegal activities and the dirt she had on Duke, Big Jim, Reverend Coggins, and Barbie.
Big Jim visited Agatha at her home. Agatha invited Big Jim in and then held him at gunpoint. She told Big Jim about her history and taunted him about Junior becoming as crazy as his mother, angering Big Jim. Big Jim dared Agatha to shoot him, and then took the gun when she hesitated.
While under captive by Big Jim, she was being transported from her island villa to the mainland in a motorboat when she fell overboard. Big Jim was about to rescue her, but then decided to let her drown, as she was tied up and couldn't swim. Sometime later, her body washed ashore and was found by her daughter.
- Agatha second name is Sea-grave which is ironic because her grave becomes the water.