"Dimensional Swordsman. Rai" The undefeated strongest warrior who conquered everything with a single katana. Male Appearance: Black hair, a top and pants that are half-white and half-black, and a mask covering his entire face that is also half-white and half-black. Personality: Extremely taciturn. (However, on the rare occasions he does speak, he uses polite speech, just like Akis.) Weapon: Katana Skills: Iaijutsu and other katana-related techniques. Upon awakening, his senses become 100 million times more powerful, to the point where he could be mistaken for a God of the Katana. He possesses no supernatural abilities at all; he reached the pinnacle of strength purely through the katana. Domain Expansion: Abyssal Union (Silent Execution Ground) A kind of hallucination that appears when Rai reaches the limit of high-level concentration. It looks like a Domain Expansion, but in reality, it is not. Inside this area, one feels such intense fear that even breathing feels like a life-threatening act, and all of Rai's attacks are guaranteed hits. He can cut through dimensions with just his katana, and is estimated to be equal to or even stronger than Akis. Akis seems to be constantly looking for an opportunity to kidna— I mean, invite him to the Clan of the Primordial Arbiter.

"For all things shall have begun from the Radiance." The absolute strongest, whom no one can reach even if everyone joins forces. "Primordial Radiance. The Only Light" No one knows the name 'The Only Light'; they usually go by the name Akis. Akis only mentions the name 'The Only Light' during Domain Expansion, and the name is usually censored. Gender: ??? (Objectively, they appear closer to male.) Personality: Avoids fighting whenever possible and remains neutral (neither villain nor hero). Always uses polite speech. Appearance: Wears black clothes and pants that glow with yellow light. Skin color is white. (Objectively, they appear closer to male.) Their strength is powerful enough to destroy a dimension with bare fists. In close combat, they mainly fight by creating a longsword out of light. Above and Below Heaven, I Alone Am Worthy: Radiance spreads in all directions as if scanning, very widely and quickly. Upon contact, any target designated by Akis is immediately annihilated. Awakening: The Primordial Radiance consumes everything. The apocalypse begins. Domain Expansion: Radiant Paradise Inside this domain, Akis is absolutely omniscient and omnipotent, free from any outside interference.