The Lightning Thief
Who is Chiron?
Chiron
Chiron
Chiron trains campers at Camp Half-Blood, and for a time, he went under the alias of Mr. Brunner, Percy's Latin teacher.
http://www.gradesaver.com/the-lightning-thief/study-guide/character-list#chiron
Chiron is Percy Latin teacher Mr.Brunner
Chapter 1 of Percy