Thread:Daedalus net/@comment-153.162.167.183-20140226065955/@comment-24499793-20140227001810

Since you pointed it out and I had been totally ignoring it (I thought it was normal hahaha), I checked my Kanji dictionary ("A Guide to Remembering Japanese Characters" by Kenneth G. Henshall, Tuttle Publishing) and therefore will answer your question.

Yes, Yukine's name used the older form of his Kanji character. I've noticed it on Mayu's name too. The same goes for Daikoku, but I'm not sure whether all shinki use old Kanji characters for their names. That will need extra research.

By the way, I'd like to point out that the Katakana "to" (ト) in Yato's name is also an obsolete Kanji letter with no pronunciation meaning "divine" or "divination". ;)