Cornelius
In the movie, Caspian asks his mentor/teacher, "Why did you never tell
me about my father?" (Caspian never knew that his father was, umm -
well, let's just say that his uncle Miraz was guilty of fratricide.)
Cornelius answered, "Because Narnia needs a just ruler, not a vengeful
one." More at:
http://www.christianactivities.com/youth/story.asp?ID=6606
More interview with Gresham