|Other family:||Carrie Mathison (aunt)|
Frank Mathison (grandfather, d. 2014)
Ellen Mathison (grandmother)
Frannie Mathison (cousin)
|Played by:||Renee St. Gelais|
|Seasons:||1, 2, 4|
|Last episode:||"Long Time Coming"|
Ruby and her little sister Josie meet up with Carrie at their house, after Carrie misses Ruby's birthday.
Later, Ruby and her sister were seen sleeping next to their aunt Carrie, when she came over to spend the night. Then her sister Josie woke up after Carrie did worrying about her and ask her to come live with them, so they can protect her, but Carrie responded no, but it's her job to protect them.