Who are the characters in The Phantom Tollbooth by Norton Juster?

 byis a children's novel written in 1961. It begins with Milo, the
young , spotting a mysterious package. When he opens it, he finds instructions for constructing
a magical tollbooth. Once constructed, the tollbooth opens up to him a magical world in which he
has adventures and is given a quest to rescue two princesses. The plot structure is that of a
fantasy quest.

The protagonist of the novel is Milo, a...