The Cylon IL-series attached to Baltar, who were assigned to seek out the Galactica's Fleet and destroy them. He initially presumed that he would learn much from the Human who betrayed his own race. (Saga of a Star World)
Voiced by Jonathan Harris
Animated by Felix Silla
Lucifer is named after the fallen angel depicted in texts of Roman Catholic and other origins, also another name for the Devil.
Maybe all IL-series Cylons are named after some form of demon in homage to Count Iblis, who originally had control over the Cylons. Though this is just speculation