A biology teacher at the Truman School known for her demanding and authoritative nature. Her disappearance during a school field trip becomes the novel's central mystery.

An outsider in Nick's class with a reputation for being a troublemaker. He comes from a wealthy but unstable family background and has a strong understanding of local wetlands.

An enigmatic and wealthy environmentalist dedicated to protecting the Everglades. He appears in a dramatic fashion to assist in the story's events.

Nick’s outspoken and supportive classmate and best friend. She stands by Nick during their investigation into the mystery surrounding Mrs. Starch.

The arrogant and unscrupulous president of Red Diamond Energy Corporation, who schemes to drill for oil in a protected area of the Everglades.

The conflicted assistant to Drake McBride who manages day-to-day operations at Red Diamond and faces moral dilemmas throughout the story.