Alfred Emerle

Earl Emerle's second son, the strongest knight of Beltram Kingdom known all around the Strahl Region as The King's Sword, it's a title only bestowed to the strongest and most trusted knight by Beltram's Kings, he is the leader of the royal guard after taking over the position from the demoted Helmut Arbor, he would be the leader of the forces trying to rescue Celia after supposed kidnapping, he would then fight against Rio and being driven to a corner for him that would escape the place too when he the brightness coming from his sword attacks blinded everyone around them.

(Source: Seirei Gensouki Wiki)