Board Thread:Questions and Answers/@comment-937287-20140310051153/@comment-5587576-20140319143708

I think Sheba is definitely Gyokuen!!! Because Solomon, Wahid, Setta, Ithnan, Ugo, Falan, and Arba wielded their own divine staff from the time when they were the "magic vessels" of the staff!

Then Gyokuen's staff is like a replica of Sheba's staff which implies that Sheba might be the Gyokuen. The possibility of her being a magi is possible too because, Ugo himself is a magi too. So yaa.