|Voice By||Jennifer Hale|
Samantha "Sam" has long, wavy red hair green eyes, and a green catsuit. She is the most intelligent and practical of the group. She always loves to hang out with her friends but she's really serious in every mission they need to accomplish. She uses her intelligence to create plans and diversions so that the girls can easily capture the villains. Sam also acts as the big sister of the team and like Clover and Alex, enjoys shopping, and visiting salons, but she is not as interested as the others and takes her studies and duties as a spy more seriously.
As a play on her intelligence, Sam is frequently brainwashed by villains as a running gag of the series. She is also the oldest out of the three spies.