Knights of the Round

The Knights of the Round (十刃, (エスパーダ)) are the top-ranked ninja in Sasuke Aizen's army of the Shadow Empire. Despite their late appearance into the plot, the Knights are often considered to be the primary antagonists of Naruto Omega Beta, particularly during the first parts of the series, being responsible for much of the conflict that transpired within the battle against Aizen.

They are all fiercly loyal to Aizen, even willing to throw away their lives for him. Their immense amount of power and leadership status among the Shadow Empire also grants each Knight the authority to exert command over Aizen's other forces within the Shadow Empire.