Wolfram von Bielfeld is the youngest son of the 26th Maou of Shin Makoku, finance to the 27th Maou, and has been nominated by the Council of Nobles to be 28th Maou. He has a contract with the element of fire, and therefore has limited control over said element within the bounds of the country of Shin Makoku. Family members include his older brothers Gwendal von Voltaire and Conrart Weller, his mother Cecilie von Spitzberg, his maternal uncle Stoffel von Spitzberg, and his adoptive daughter Greta. Father unknown, presumed dead.
Wolfram's engagement to Shibuya Yuuri 27th Maou of Shin Makoku was an accident resulting from Yuuri's lack of familiarity with Mazoku customs. It has been speculated that in the beginning Yuuri would not break the engagement so as not to wound Wolfram's pride, and Wolfram either didn't want to end the engagement or forfeit the right when he lost a duel with Yuuri.