Tristam

"My, my. Erica, you get bigger every day. And it's a pleasure to meet you, Mortimer."

- Tristam to Erica and Ben in Spy School Secret Service

Tristam is a security guard located at the British embassy. He seems to know Catherine and Erica Hale. When Ben, Erica, and Catherine enter the Embassy, they stop at the security gate and Catherine says, "Morning Tristam!" to which he replies, "Good Morning Mrs. H." Ben poses as Erica's friend, Mortimer, for Tristam to allow them access into the embassy.