Oh my heavens. More videos to sleep by. I simply love hedgehogs. I can't believe the cats and Piko get along so well. That's a remarkable inter-species friendship!
Piko is never going to leaving. Keep the doors open. As with the cats, he is free to go whenever he wants, but he has imprinted on you, I believe, and you are his friend for as long as he lives.
Very happy viewing, @borjan