Age unknown. Characterized by red hair, red eyes, and a black tattoo running under his eyes. He possesses a coexistence of childlike innocence and extreme cruelty. He exhibits a level of selfishness so pure it almost seems naive, yet he is a unique character who never stops putting in effort despite being a natural genius. He never underestimates his opponents and always faces them with his full strength. He is a Hellion, specifically from the 'Protector (Beastmen) Clan.' Hellions live underground and have long been despised by both humans and Celestials. The Protector Clan, in particular, has the unique ability to swallow an opponent, assume their physical appearance, and freely use their powers. The swallowed victim does not die but remains unconscious inside the body; if necessary, Anon can spit them back out to deactivate the transformation. Anon's father was a man who harbored a deep-seated grudge against humans and Celestials. Anon's father swallowed the real Margaret to impersonate him and attempted to overthrow God, but failed. Subsequently, he put Anon forward to carry out his plan. Anon first appears before Robert alongside the fake Margaret. To Robert, who had begun to question his own actions after fighting Ueki, Margaret declares that he is no longer needed. After revealing his true identity, Margaret introduces Anon as the one who will take over the battle in Robert's place. In just eight minutes, Anon overwhelmingly defeats Robert, a 10-star Celestial who had awakened to Level 2. Robert is defeated without even being able to properly use his powerful abilities or Sacred Treasures, and is swallowed by Anon. Through this, Anon dominates Robert's body and mind, making Robert's powers his own. Afterward, Anon continues the power user battle in Robert's form, observing the situation. He even intervenes in a battle against Team Ueki, retiring all the members. This was intended to create tension so that Team Ueki would grow stronger in a situation where they might have won too easily. Later, in the finals, Anon intrudes upon the site where God and the fake Margaret are fighting. Using Robert's Sacred Treasure, he retires God and swallows him as well. He then uses the Sub-Sacred Treasure 'Genesis' to create a new battlefield, the 'Hanging Gardens,' and draws the participants there. Anon proposes new rules: any participant who falls off the map even once is disqualified, and if all participants work together to defeat him within 12 hours, they win. However, if no one can defeat him, he wins, and he declares that upon his victory, he will destroy the Celestial World, the Hell World, and the Human World. Anon eventually faces Ueki in the final showdown. Initially, he pressures Ueki using the Sacred Treasures and powers stolen from Robert. However, as he is pushed into a corner as the battle progresses, Anon spits Robert out of his body. He then turns himself into a 'non-power user' to nullify Ueki's ability, driving Ueki to the brink of erasure. Yet, even with his life on the line, Ueki refuses to give up and stands against Anon until the end. Ultimately, Anon is defeated by Ueki. However, Anon's true goal was not the destruction of the world. After his defeat, he reveals that his dream was 'for someone to appear who could beat me.' He had become so strong that no one could face him, and he wanted someone to truly surpass him. He felt that if such a person did not exist, it would be better to erase everything and live alone. To Anon, the destruction of the world was an extreme choice born of loneliness and despair rather than a goal. While he wanted someone who could defeat him, he didn't know how to have comrades to share joy and sorrow with. To such an Anon, Ueki tells him that a dream is only a dream because there is someone to be happy with when it is achieved. For the first time, Anon expresses a desire to have comrades like Ueki. After the incident concludes, Anon is deported back to Hell.

A Celestial. Robert's father. His true identity is a Hellion and Anon's biological father. A Beastman who swallowed the real Margaret and is posing as him.

A Celestial. A participant in the battle. Has green hair. Cannot stand injustice.