The alias known as Pain was made by Nagato with the drive to bring peace to the world through any means necessary. The Pain or perhaps the Six Paths of Pain were made by Nagato to be utilized to capture the Jinchurikis and eliminate their targets with precise lethality and overwhelming aggression. With Yahiko being the Tendo path.
Yahiko was the public image of the Akatsuki's leadership before his death by the hands of Hanzo and conspiring Danzo Shimura. He was originally seen as a symbol of peace for his group and inspiration for Nagato to seek out a better world. Before these events transpired, Yahiko was orphaned during the Second Shinobi World War, forcing him to steal food in order to survive prior to teaming up with a fellow war orphan named Konan. Soon after they found a place to call home, Yahiko expressed his displeasure from Konan bringing another war orphan, Nagato, into the group. However, Yahiko eventually accepted Nagato and his dog Chibi into his group. Angered by how unfair the world was to them, Yahiko declared that he would become a god to end the fighting. Soon, after the death of Chibi, Yahiko and the others eventually encountered Jiraiya, who looked after them and taught them basic ninjutsu. At one point, Nagato saved Yahiko after an Iwagakure chΕ«nin attacked them. Afterwards, Yahiko vowed to become strong enough to protect Konan, Nagato, and eventually all of Amegakure. This will lead to later events where their inspirations led to their demise.
Yahiko's personality was similar to Naruto Uzumaki's, albeit with a few darker differences. Like Naruto, his dream was to be a leader of his village, and he never gave up no matter what. However, when he was alive, Yahiko had strong "eye for an eye" and "survival of the fittest" philosophies. He hated the way Amegakure was looked at by the rest of the world, and hated what it had become. He was defensive of the village, saying that it was his dream to stop the endless rain, which he compared to tears, and protect the nation's citizens. Yahiko wanted to become the ruler of the world so there wouldn't be any more wars. It was implied by his dialogue that this also gave him somewhat of a God complex. Many of these traits were adopted by Nagato after Yahiko died.
