Complex sentence: Sadistic, ruthless and brilliant, her ambition is matched only by her arrogance and cruelty, she is the second-in-command, as well as John's chief science officer of the fleet of 50 Visitor ships.
Split into simpler sentences: Sadistic, ruthless and brilliant, her ambition is matched only by her arrogance and cruelty. She is the second-in-command, as well as John's chief science officer of the fleet of 50 Visitor ships.