Sian

	[show/hide spoilers]; Spoilers hidden in infobox by default.
Age
Colony
Birthplace	{{{birthplace}}}
Birth Name	? Sion
Birth Date	{{{birthdate}}}
Callsign
Nickname	{{{nickname}}}
Introduced	[[{{{seen}}}]]
Last Appearance	[[{{{lastseen}}}]]
Death
Parents
Step-Parents	{{{step_parents}}}
Siblings
Children
Marital Status
Family Tree	View
Role	Communications Officer, CIC, Battlestar Galactica
Rank	Petty Officer
Serial Number	{{{serial}}}
Portrayed by	Georgia Hacche
	Sian is a Cylon
	Sian is a Final Five Cylon
	Sian is a Human/Cylon Hybrid
	Sian is an Original Series Cylon

Petty Officer Sion was on duty in Galactica's CIC, filling in for Petty Officer Anastasia Dualla during the hostage crisis on Cloud 9 (Sacrifice).

Georgia Hacche, who plays Sion, has actually been a backround extra in CIC since the Miniseries. "Sacrifice" was the first time she received a name and dialog.