He comes in in Volume 40, but 41 is important too it tells about his past and who he is.
first Tobi started it in manga but if its in show pein
Nagato is Pein, so if he was Pein, then Pein would already have the Rinnegan.
I first had trouble with that but the answer is pain
Konan is Pein's partner.
Pein is not a word in the English language. However, Pein is the leader of Amekagure in the anime of Naruto.
Pein's fullname is never revealed. Pein is really Nagato, and just an alias that was created.
Nagato give pein the rinnegan
No Neji does not fight pein.
Pein is taller but not by much.
I heard that Konan and Pein make a great couple, but in Naruto Shippuden, Pein dies without Konan saying she liked Pein, there is no proof.
No, because Pein killed Kakashi, proving one thing. Pein is stronger.
No, Tobi does not kill Pein. Pein sacrifices himself when he revives everyone he kills in Konoha.