There were a lot of really cute touches here, but I think my favorite was Kaya making peace signs for Mob because she knows he's there and taking pictures. It changes the dynamic a lot. We already know he's not a bad guy and why he's doing it, but it's still weird for a man to be secretly taking pictures of a young kid. But it's not a secret. She knows. He's like an adoring uncle who she knows will be very happy if she indulges him.
That photo didnt have the spectre in it, it only showed Namu's arm which is cursed or something from his childhood. The photos which spectres came out of all the spectre in it. A spectre didnt come out of the picture where Kaya was making a peace sign either, as the spectre wasn't in that photo either.