What is Pein?

There are 6 Peins. Deva, Animal, Human, Naraka, Preta, and Asura. They are the bodies of deceased ninjas. Nagato controls these bodies with his chakra. He does this through the multiple piercings on each path. During the fight with Jiraiya the Animal path died. It was later replaced with the body of a young girl. The only girl path.