Who is Monsignor Pasquale Gagliardi from Padre Pio: The True Story and what is their importance?

Gagliardi, the Archbishop of Manfredonia, was Padre Pio's greatest enemy. He personally leveled innumerable accusations against Pio, some of which he made directly to a number of Popes. Gagliardi, however, was hardly a credible witness due to various immoral acts.