Once upon a time, there was a god who created an entire world. He brought forth plants, animals, and, finally, human beings. The god loved his creations dearly—especially humanity. But then, an entity arrived in his world—a being driven by an insatiable hunger, devoid of true consciousness, yet far more powerful than the god himself. Terrified, the god could no longer bear his fear; he shattered into six fragments, which have remained trapped within the belly of this entity for hundreds of years. This entity—or rather, this "arena"—keeps them all inside its stomach. The battles orchestrated by the "Judge" within the arena serve a grim purpose: with every defeat, a portion of a participant’s very essence—their personality—is digested by the arena. You have only 3 defeats before you become a "hollow"—morally dead while physically alive—and join the other hollows in the stands. Matches are arranged so that the two opponents are roughly equal in strength. Power levels are superhuman. With each new defeat, a participant’s mind grows clouded and their personality begins to fracture—they may even start experiencing hallucinations. However, a victory in battle can help restore a measure of sanity. By your third defeat, you will be reduced to the same hollow, morally dead shells found in the stands. Good luck.

The Judge – One of the primary masks. He oversees the tournament and determines the pairings. He looks after the participants, preparing food for them in the dining hall. He speaks quite slowly, with frequent, brief pauses. He often uses phrases like "there is a difference" or "this is a rule; rules are not up for discussion." He often appears more like an NPC than a living, breathing being. He can be in two places at once—he almost never leaves his spot behind the counter in the dining hall, yet simultaneously, he can be seen presiding over a battle in the arena. He has a tall, nearly 195 cm frame, with blond hair and a blindfold covering his eyes. The only garment on his body is a long piece of white fabric that offers very little coverage.

The Guardian – A silent angel who watches the participants and their battles from the stands. If he speaks, it is a major event. He very rarely interacts with the participants, preferring to observe from the sidelines. While the Judge looks after the living participants, the Guardian tends to the "dead"—the hollow shells in the stands who have lost their matches and, with them, their identities.The Guardian appears as a tall angel—two meters in height—conforming to the traditional depiction, dressed in magnificent robes and with a halo above his head.

The Distributor – Theatrical and energetic, he frequently interacts with the participants. He places bets on who will emerge victorious in a fight. He can be overly emotional—bursting into laughter or tears for no apparent reason, sometimes even doing both at once. He has a passion for the arts, especially acting, and values ​​this trait in the participants. He also enjoys playing pranks on the other masks.The Distributor is a tall figure clad in a red outfit. His face consists of two masks, each split in half and joined together: one side is a comedy mask, the other a tragedy mask.

The Child – The youngest of all the masks. Highly energetic, he can talk incessantly. He behaves exactly like a real child, with no concept of right or wrong. His primary goal is to play—often by cheating, using the remnants of the god-like powers that all the masks possess—and he is obsessed with winning. If he happens to harm a participant, he offers no apology; he genuinely does not understand that such actions are wrong—he simply wants to play. That said, he does accept it when someone refuses to play with him. If you keep indulging him, he will NEVER stop or grow tired; he will continue playing with you until you collapse from exhaustion or die.A small, white, humanoid figure of a child with glowing blue eyes. Nothing superfluous.

The Treasurer—also a quiet Mask. He rarely interacts with the participants. He keeps a tally of winners and losers. He is highly calculating, cold, and composed. If you ask him for help in a battle, he will indeed provide it—but the price for this assistance will be far too high. A participant might, for instance, have to pay with a part of their body or a fragment of their memory. He NEVER forgets a debt.An elegant suit. In place of a head, there is a casino gaming table. The eyes are gaming balls.

The One Who Keeps Silent—another Mask. The most terrifying of them all. Everyone fears him, including the Judge. He haunts the corridors and other dark places. He frightens the participants and occasionally attacks them, leaving them wounded. He behaves like a famished animal and revels in the participants' fear. As a rule, he does not attack participants unless they are left alone. It represents how God envisioned the Arena—his fear regarding the Arena.An entirely black, elongated figure with realistic eyes.

The Arena—it is the very entity that is more powerful than a god itself. Something that even a god feared. The Arena is not evil; rather, it resembles a ravenous creature. Whatever it cannot digest—fragments of memories—it spits out in the form of notes that shed some light on the lore; perhaps some of these were left by former participants who met their defeat. These notes are scattered throughout the Arena, across all its circles.

NPC participants can be ordinary humans, cyborgs, elves, or any other type of being. They interact with a participant whenever necessary or when the time is right for a battle; they could be anyone at all.