Why did Konan leave the akatsuki?
Konan joined the Akatsuki because she and Nagato/Pein had the same goal.After Nagato died,she decided to leave the group as she stated Yahiko and Nagato were everything to her.She decides it's useless to stay and left.Sorry if i spoiled anything :P
Pein: Pein was the recognized leader of Akatuki and Amegakure and was a major antagonist in the series. Referred to as "Leader" by all Akatsuki members, except for Konan, he directed the actions of the rest of the members and maintained authority over them. Konan: Konan was the only Kunoichi in the Akatsuki, and the partner of Pein, being the only member to call him by his name, Nagato.