Stafford has gray eyes, graying hair, and a wheatish complexion. He wears a gray suit with a white shirt, gray pocket handkerchief, and a black and white checkered tie. He also wears a lapel pin.
Stafford is implied to believe in second chances, allowing the passage of Chris's proposal to allow people with criminal records like Zig a second chance in life by attending Hartfeld University. He also has a strong sense of justice, as shown when he suspended Manny and banned him from the football team for stalking and harassing Chelsea and disrespecting other members of the football team.
- Chapter 4: Budgetary Concerns (Off-screen)
- Chapter 11: Rock 'Roll' Hartfeld (Mentioned)
- Chapter 15: Take a Chance on Me
- Chapter 15: Bitter Sweet Symphony
- Chapter 9: Bye Bye Bye
- Chapter 14: Graduation (Friends Forever)
- Chapter 13: Look What You Made Me Do
- Chapter 15: Changes
- Chapter 12: You Mean The World to Me (Off-screen; Determinant)
- He resembles actor Charles Dance who portrays Tywin Lannister in Game of Thrones.
- He appeared, albeit not in person, in the Vaanu ending in Endless Summer, Book 3, where he presented Grace and Aleister as the valedictorians of their graduating class.
- He shares the same first name as Martin, Martin Schmidt and Martin Silva.
- The name Martin is of Latin origin and means: Warrior, of Mars, warlike.
- The surname Stafford is of English origin and means "from the ford by the landing place".