Akatsuki

Akagfkvkgvgkvkgkgvgkgkgtsuki was once an organisation full of power-hungry warriors which plays a central role in the Second Warriors War.

Akatsuki's Invasion
The Akatsuki expected the warriors of different villages to invade InuYasha's homeland in hopes of getting the mystical jewel, The Jew el of Four Souls. During the events of Operation: Blow Away, as mentioned by Jūzō Biwa, Deidara and Sasori, they murdered the remaining warriors who failed to get the mystical object.

Seeing that Sasuke's invasion failed, Zetsu in secret monitors the event and relays the mesage to Pein who now leads the Akatsuki believes InuYasha, Bankotsu, Hinata Hyūga and Sesshōmaru are in possession of the Jewel of Four Souls and believes this sacred jewel to be crucial for the tailed beasts.

Pein leads his warriors to InuYasha's homeland to face only the four surviving warriors. With the deaths of the Akatsuki warriors, Itachi Uchiha was the only survivor. Demanding an explanation about the First Warriors War, Itachi explained to Sesshōmaru that the warriors had been misguided by Sasuke whose obssession for greed and immortality. Itachi explained further that he schemed other warriors to fight them, knowing they were about to die. That way, he would have gotten hold of the Jewel of Four Souls.

Akatsuki - Espada War
The Akatsuki realised Aizen and Orochimaru betrayed Pein and the Akatsuki.

After remembering the kidnapping of Orihime Inoue and Aizen making a deal with Xemnas to deal with Akatsuki, Pein had a change of heart ordered the Akatsuki to deal with their rival faction, Organisation XIII.

After emerging victorious, they made it to Pein's Fortress where they confronted Aizen's facti

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