It is the real name of "that man" who appears in Guilty Gear.
At the end of GGXrdR's story, Sol=Badguy made it clear. At the same time, he is showing his true face, which he had been trying to hide until now. It is unknown because there is no longer a need to hide it, but his personality is quite revealing. being pulled out. As an aside, if you connect the initials of your name, middle name, and family name, you get ARC.