What kind of spirit would this be?

Not all spirits are evil and noisy and spiteful. Occasionally we get one (once in a great while), that appears to want to help. We worked a case were the spirit wanted to tuck the baby in and give it its bottle and sometimes a pacifier. When we set up the camera, it would always go to static during these times. We tried to trick the spirit, but it was always one step ahead of us. It was actually kind of funny. We did however, pick up a cry from the baby and then a humming sound on the EVPR as though the spirit was trying to lull the baby to sleep again. The client readily accepted the fact and actually wanted to 'welcome' the ghost personally, which we did not participate in.