The Naruto franchise ranks among the most popular in anime history, and since its debut in 2002, it has introduced several of the most beloved heroes to ever grace the medium. However, for every memorable protagonist seen in Naruto, there are just as many notable antagonists. In particular, the Naruto: Shippuden series is chock-full of quality villains, many of whom ply their villainous craft as part of the powerful group known as the Akatsuki. The group's leader, Nagato (who uses the Pain persona as a cover for his true identity) nearly brings the Hidden Leaf Village to ruin using his greatest power — the Rinnegan.
Source：https://www.cbr.com/naruto-nagato-madara-rinnegan-explained/
