He is an antagonist throughout the series, manipulating conflicts and problems behind-the-scenes.
He was from the country Dahan, before it was destroyed by the Yotsuba clan and assimilated by the Great Asian Alliance. He now has to work for them. However he shows no real loyalty to the Great Asian Alliance, and is actually trying to sabotage the Great Asian Alliance for his own benefits. He wishes to destroy the Yotsuba clan, so that he can avenge his fallen country.
(Sources: Wikipedia/Mahouka Koukou no Rettousei Wiki)