He would be so endearing with them!
Once he got over the shock of his new size, and managed to get past his innate fear of hurting them because they’re so small next to him omg, he would be a lot calmer than Dean, never reaching without warning and Kara would be climbing him constantly.
Krissy would be an interesting one to see with Sam, as she has a phobia of humans and hasn’t built up the courage to see Dean face-to-face yet. She knows Sam, so she might be able to overcome this fear with his help.
Walt is wondering why his life is so crazy.