Roleplay it is! Going to RP as my old Nagato bio, as it is most fitting. We'll back track a bit to introductions and then jump straight into techniques.
Nagato found himself standing on the surface of the massive lake which surrounded Amegakure. Today he was going to meet a new student, a fresh face, a young mind ready to learn the secrets of his village's most prized Ninjutsu: Rain. With his back turned to his pupil he began to speak, "You've come here to learn precious secrets; but why? Of all fields, why do you seek Rain? How will it serve you in your mission?" These were deep questions. He did not expect concrete answers to such potentially thought provoking inquiries, but it certainly was a good place to start.