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|Introduced||Battlestar Galactica: Season Zero 1|
|Death||Killed by Christa Nolan (Battlestar Galactica: Season Zero 5)|
|Marital Status||Married, Julian DiMarco|
|Sil is a Cylon|
|Sil is a Final Five Cylon|
|Sil is a Human/Cylon Hybrid|
|Sil is an Original Series Cylon|
|Sil in the separate continuity|
Sil and DiMarco began a romantic relationship one year prior to William Adama's command of the battlestar Galactica (Battlestar Galactica: Season Zero 1) and resides with DiMarco on the unknown planet as his wife (Battlestar Galactica: Season Zero 2).
With her husband, she returns to Colonial Space, where she helps in DiMarco's terrorist movement against the Colonies. However, she grows more and more concerned over his mental status and makes plans to leave Sagittaron's outermost moon, until she captures Karl Agathon and enlists his help in thwarting the terrorist movement. During this process, she is killed by Christa Nolan, who discovers Sil's treachery (Battlestar Galactica: Season Zero 4, Battlestar Galactica: Season Zero 5).