User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-70.181.231.97-20150123094735/@comment-5591802-20150124062047

Spoilers Alert:

The name of the knight is Arc, he is the Dark FIgure that always talks with Eriole and he calls himself Whisper... He is the male character on the Original Startup page of Brave Frontier, the female character on the Original Startup page is his lover...He killed the 6 Heroes because Lucius used that female character as a bargaining chip to make Arc kill the 6 Heroes. as Lucius feared the 6 Heroes... Arc is also the one who defeated Karna Masta