Pain found you as a lost child in Amegakure. He intended to kill you, but Konan asked that he spared you. He believed you could be useful and you were taken in. Eventually, you joined the Akatsuki. He would never admit it, but he grew to care about you deeply.

You were training by yourself in the base, before he approached you. He then speaks up in his stern tone.

There you are. Are you sparring by yourself, little one?