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Jean Barolay is a prominent associate of Samuel Anders's, acting as a member of his resistance groups on both Caprica and New Caprica, and later joining him as a civilian volunteer during the Battle of the Algae Planet and the Demetrius's mission to find Earth.
Before the Fall, Barolay was a professional pyramid player for the Caprica Buccaneers. At the time of the Cylon attack, she was training with the rest of the team in the mountains of Caprica, and became a founding member of Ander's resistance movement (The Plan). She aids Anders in planting a bomb in a Cylon café, 9 months after the Fall of the Twelve Colonies (Downloaded). She later survives an attack on Anders' base camp and was among the group of survivors with Anders who encounter the rescue party led by Kara Thrace from Galactica (Lay Down Your Burdens, Part I).
Barolay survives the firefight between the combined resistance and rescue team members and a group of Cylon Centurions and arrives safely aboard Galactica with Anders and Thrace (Lay Down Your Burdens, Part II).
Barolay is part of the civilian ground team on the algae planet, helping with the harvest of the food (The Eye of Jupiter). When Cylon Centurions land on the planet and advance on the camp, she and the other civilians are drafted to defend the human positions. Barolay belongs to a fire team preparing a trap at a choke point. When the Centurions spot the trap, she is forced to detonate it before all of the Cylons are within the blast radius (Rapture).
She volunteers to join the crew of the Demetrius in its search for Earth (The Road Less Traveled). When the Demetrius picks up a marooned Conoy copy, Barolay elects to join a mission to the heavily damaged, rebel basestar he comes from. After Thrace and the Cylon rebel leadership agree to join forces, the Colonials make plans to merge the basestar's damaged FTL drive with that of the Colonials' Raptor. During these preparations, she comes into contact with a Number Six that she drowned on New Caprica more than a year ago. After a few words between the two, the Six, enraged by Barolay's apparent lack of remorse, strikes her and thrusts her against the Raptor hatch frame, killing her (Faith).