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|Colony||Tauron, relocated to Caprica|
|Children||Shannon Adama † (daughter)|
|Portrayed by||Karen Austin|
|Ruth is a Cylon|
|Ruth is a Final Five Cylon|
|Ruth is a Human/Cylon Hybrid|
|Ruth is an Original Series Cylon|
|Ruth in the separate continuity|
In 58 BCH, she lives with Joseph Adama and his son, William, on Caprica after the terrorist bombing of Maglev 23 claims both her daughter's and her granddaughter's lives. She has repeatedly attempted to convince Joseph to tell his son William about their true heritage as Taurons, eventually succeeding in this (CAP:Pilot).
After Amanda Graystone announces publically that her daughter Zoe Graystone was involved in the bombing of Maglev 23, Ruth supports Joseph's plan to have Amanda assassinated by his brother Sam Adama, believing in blood for blood (CAP: "Gravedancing").
Ruth notes that Evelyn is good for Joseph and implicitly gives her her blessing to pursue a relationship with her son-in-law by telling her that she and William will be staying with her sister for a while (CAP: "False Labor").
Ha'la'tha member Francis is sent to Joseph's apartment to assassinate him after the Guatrau decides to have the Adama brothers killed for smuggling U-87 Cyber Combat Units to Tauron against his wishes, but Ruth kills Francis with a meat cleaver to the back. Ruth then keeps watch in the apartment with a gun while Joseph, Evelyn and William go to Goldie's, a local restaurant, to retrieve fake I.D.'s for going into hiding (CAP: "Here Be Dragons").
Following the death of her grandson William in a shootout at Goldie's, Ruth is disgusted that the Guatrau's supporters' vendetta would extend to a child. She continues to be part of the Adama family after Joseph marries Evelyn and has another son, also named William (CAP: "Apotheosis").
- It was revealed in an e-mail that Ruth has tattoos located high on her right arm that represent her children and grandchildren. 
- Ruth's surname is never used.
- Wagner, Curt (February 17, 2010). Exclusive: 'Caprica' producer Jane Espenson explains Sam Adama's tattoos (backup available on Archive.org) (in ). Retrieved on March 25, 2010.