Jemma Stern

Jemma Stern is the daughter of the United States President, David Stern. She first appears in Spy School Secret Service when Ben goes to the bathroom, but when he opens the bathroom door, Jemma is there. According to Jemma, there isn't much of a need to lock the bathroom door in the White House, as it is her home. At the end of the book, she approaches Ben and is surprisingly cheerful, although he later realizes she actually wants to get closer to Mike Brezinski.

Mike Brezinski
Jemma Stern finds Mike attractive at the end of Spy School Secret Service and they start dating, however they break up later because Jemma wants the relationship to be more serious whereas Mike does not. She wants him to go to Hawaii with her, but he wants to go on a mission but could not tell her. She is upset when Mike does not respond to her calls in Spy School Goes South. As of Spy School Revolution, Jemma has blocked Mike's calls.