Those pictures say it all, I'm so happy that your sister loves Paddy so much and feels so comfortable with him perched on her. It's truly heart warming! 
It really is great that your boy is so friendly towards other people too, my Khaleesi is only bonded to me and doesn't feel safe (flies to me and hides under my chin) when there are other people on the same room he is in during out of cage time.
It really is great that your boy is so friendly towards other people too, my Khaleesi is only bonded to me and doesn't feel safe (flies to me and hides under my chin) when there are other people on the same room he is in during out of cage time.