The Pope (ローマ教皇, Rōma Kyōkō?) and the head of the Roman Catholic Church in the Toaru Majutsu no Index series.    His real name is Matthew Reese (マタイ＝リース, Matai Rīsu?). He was a friend and a former disciple of Fiamma of the Right before becoming Pope.     Unlike a lot of popes in the real world, he feels that he&#039;s disconnected from the people outside the chapel and wonders why&#039;s that so. Despite this he is still bound by the rules of the Roman Catholic Church and its beliefs. When the magic world learns of the existence of Touma and his powers, Fiamma convinced the Pope that Touma is a Heretic and his powers are a threat to the world, The Pope declares him a Heretic that must be eliminated.     He&#039;s an elderly man with a white beard. He wears the typical papal regalia and bears a crosier bearing the figure of a crucified Christ on the front and the figure of the hanged Judas Iscariot on the rear. 

Index is still a fugitive, and many powerful magical organizations and individuals want to take her to use the books in her memory, eliminating her in the process. War between those organizations is also starting to emerge. Index can only rely on her friend Touma, who has always protected her, along with Misaka and other friends from the Academy. 
 
(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/木村雅史)

Science, magic, and a nun on the run! Kamijo and Index return just in time to celebrate A Certain Magical Index’s 10th anniversary with a brand-new season. After their deadly struggle against the Catholic Church and the pending war between magic and science, Kamijo must work harder to protect Index. But with tensions high all around, what new adventures await them in this next chapter?
 
(Source: Funimation)

Set in a city of not only scientifically advanced superhuman students, but in a world where magic is also real. Kamijyo Touma's right hand, the Imagine Breaker, will negate all magic, psychic, or divine powers, as well as his own luck. One day he finds a young girl hanging on his balcony railing. She turns out to be a nun from the Church of England, and her mind has been implanted with the Index Librorum Prohibitorum&mdash;all the magical texts the Church has removed from circulation. 
(Source: Wikipedia) 
Note: Includes 16 prologues, 18 epilogues, and 6 extras.

The story is set in a world where supernatural powers exist through science, and magic exists through religion. 
In the story, Touma Kamijou is an ordinary high school boy with terrible academic scores and a power called Imagine Breaker. Imagine Breaker can defeat any other power, but it also undermines Kamijou's own good luck. His Imagine Breaker's immense strength is literally immeasurable, so hapless Kamijou is listed at the supernatural level of 0. He happens to meet a girl in white hanging off his window balcony. The girl says she is being chased by sorcerers, and Kamijou learns that the girl is a Church of England nun whose memories have been forcibly replaced by Index-Librorum-Prohibitorum &mdash; the 103,000 forbidden texts of the Church.