I know very feel about Pain but assuming his name is a representation of what power he posses this should be interesting.
Pain searches in the world for knowledge on more brutal powers, that's when he finds The Lexicon Guardian, who tells him that all he foresees is inside the Box. He's able to solve the puzzle only to summon Pinehead, The God of Pain, who wants his soul for an eternal torture in hell.
Nagato (長門, Nagato), also known as Pain (ペイン, Pein), was the recognised leader of Akatsuki and Amegakure as well as a major antagonist of the series. Referred to as "Leader" by all Akatsuki members (except for his partner, Konan), he directed the actions of the rest of the members and maintained authority over them. It was later revealed that he had secretly collaborated with Tobi, who was the real leader of Akatsuki.Nagato is also a descendant of the Uzumaki clan — who are distantly related to the Senju clan.
Pinhead is the main antagonist of the Hellraiser film series. He is the leader of a group demonic torturers known as the Cenobites, with pins in his head. He usually kills his victims by tearing them apart with hooked chains but is in command of an arsenal of demonic powers and is a master of torture who often prefers to drag his victims into an eternity of suffering rather than outright death - in the first film he was largely neutral but as the series progressed he became a more standard horror villain and murdered more frequently.