Board Thread:Questions and Answers/@comment-223.27.94.3-20131004100248/@comment-3445779-20131004192544

Nothing is really known about the Old man in the photo other then he gave the Violet Mansion to Yukariko (Nagi's mom) when she was younger. though its a possibly he might have known magic (shown in chapter 291, when Chiharu found the photo of the old man when she stumbled upon a book entitled "black magic" when Hayate was getting rid of the stuff that was left behind by the previous owners of the Violet Mansion), and the old man was apparently acquaintances with Himegami (shown in the other half of the photo in chapter 370).