Colin Singleton - This character has a habit of dating girls named Katherine.
Hassan Harbish - This character is Colin's best friend.
Keith Carter - This character is Colin's tutor.
Lindsey Lee Wells - This is the 17-year-old girl that Colin and Hassan meet when they stop to see the grave of the Archduke.
Hollis Wells - This character offers the boys a summer job.
Katherine I - The daughter of Colin's tutor, Keith.
Katherine III - She does not seem to comply with Colin's theorem.
Mrs. Singleton - She is a French teacher at the prestigious Kalman School.
Mr. Singleton - He is a professor at Northwestern University.
Mr. Harbish - This character wants Hassan to stop delaying his acceptance into Loyola University.
This section contains 170 words
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