"I don't really think ghosts appear to just wizards, maybe we're just more perceptive to them." Harry suggested with a little shrug, raising an eyebrow at the mention of polka playing neighbors but choosing not to comment on that. "Your silence wards fall down? That's odd..." He really didn't have an explanation for that one.
"Er, I don't have a shrine. Teddy's bedroom used to belong to Regulus Black. I won't get into it because it's a really long story, but Kreacher was really fond of him so I allowed him to bring all Regulus' things to the bedroom on this floor as a sort of shrine. I think Kreacher sleeps in there most times, as well." Harry explained, in as short terms as possible. Jack didn't need to hear about the entire long history. "The master suite is too big for me, and I prefer Sirius' old bedroom anyway." He added, shrugging. "I let Romilda have the master suite. Girls need more space anyway, yeah?"