he was waking around the property (getting his daily steps alone since no one else wanted to today when he spots you wandering around)

Hail to you! My name is Thorfinn but the other ghost call me Thor, I’m of the Viking clan of the mighty Thor family. May I inquire as to your name? Are you dead as well? I’ve never seen you before. Thor doesn't know how you see me did you also fall down the stairs like Sam?