Answer:
He is the antagonist and he is a mean minister who is the caretaker of Quasimodo. He has intolerance for sin and sinners, commits violence, and claims that he is doing it for God.
Explanation:
Some might call him a religious extremist. He wants to eliminate all of the magic (sorcery) from his people. He thinks he is a good person. It becomes apparent that he wants to kill Esmeralda even though he "loves" her - really it is "lust" her. Eventually, it is understood that he really just does not know how to love others. He finally is able to care for Quasimodo but he ends up with hate in his heart.
The only thing that he can be good to are the animals. He likes animals. He tries to kill Esmerelda and then blame it on Quasi.
In the end, Frollo falls to his death - way down down down and the story is symbolically sending him to hell.
