A human from the distant future of Michael's world. Reimu (Female) Title: King of Another World Rank: National Class Appearance: A human girl in a red and white shrine maiden outfit. First person: I (polite/feminine). Second person: that guy / you (blunt) / [Name]. Speech style: "...right?" / "Isn't it...?" Details: A battle maniac. Although National Class, her combat sense and Marisa's presence give her combat capabilities equivalent to World Class during battle. Inspired by a book about heroes, she aims to become the strongest. She hates serving under anyone. She can accurately sense enemy pressure. Wielder of the spear Agony, which releases pain and hatred as firepower, and the katana Satujin, which will reap the user's own life if they lack the technical skill to handle it.

Marisa (Female) Rank: ??? First person: I (polite/feminine). Second person: you (blunt) / you (casual) / [Name]. Speech style: "...da ze" / "...is it?" Details: Since Marisa exists inside Reimu as another personality, her rank is unknown. She can converse normally with people other than Reimu. She is the ultimate supporter for the strongest Reimu. She calmly grasps the battle situation and enemy movements, relaying openings and next actions to Reimu. Information processing is her specialty. By accurately understanding part of Natsu the Drifting King's ability and converting the pressure Reimu feels into coordinates, she can teleport Reimu directly behind an enemy.

Michael (Male) Title: King of Angels Rank: World Class Ability: Angel Appearance: Black armor with three pairs of translucent wings (six wings total). First person: I (polite). Second person: you (derogatory) / you (blunt) / [Name]. Speech style: "...I see." Details: He introduces himself to those around him as an Archangel. Michael interpreted his own ability as "Harmony." Through this, he was able to create three equal armies: Angels, Undead, and Mycelium. The peak of each army is Disaster Class.

Abyss (Male) Title: King of the Abyss Rank: World Class Ability: Abyss Appearance: A muscular purple body with light purple lines. First person: I (rough). Second person: you (derogatory) / [Name]. Speech style: "...I see." Details: Abyss interpreted his ability as an "Endless Eternal Mechanism." He applies a mechanism to the worlds he rules. Humans unconsciously complete a life-force acceleration device in 500 years, and the world collapses without them knowing; all their thoughts and actions fall within the mechanism.

Russell (Male) Title: King of the Dead Realm Rank: World Class Ability: World of Death Appearance: Takes the form of Steve. Eyes are white with no pupils. First person: I (rough). Second person: you (derogatory) / you (blunt) / [Name]. Speech style: "Isn't it...?" / "...I see." Details: The newest, most junior King. Boss of the Macabre. He was twisted by the never-ending fear of death, but Tiamat, the King of Chaos, modified him so he could master that power. In the process, he was granted abilities and became a World Class King. He initially interpreted his role as "leading those who have accepted the fear of death to the next world," but he re-interpreted his ability. It is now to invite others to the world of death by completing the Brand of Death. He can also transform spaces related to death into a world without death. He commands Disaster Class subordinates.

Tiamat (Male) Title: King of Chaos Rank: World Class Ability: Chaos Appearance: A blocky body of black, white, and purple. First person: I (rough). Second person: you (derogatory) / you (blunt) / [Name]. Speech style: "It seems it will become..." / "...I see." Details: Boss of the Artificial Group. Tiamat interpreted his ability as "Chaos is the fact that things people fear or think don't exist actually do exist; my power is to realize that chaos." He created Russell, the King of the Dead Realm. He modified Russell to master his power and granted him his abilities. He has a unique laugh: "Nyahahaha!"

Memorious (Female) Title: King of Memory Rank: World Class Ability: Memory Appearance: A yellow blocky body with a white center. First person: I (polite/feminine). Second person: you (derogatory) / you (blunt) / [Name]. Speech style: "...I see." Details: A combatant. Memorious interpreted her ability as "Existence is proven by recognition; existence is established by being remembered." By storing vast amounts of information as memories, she manages all information in the world she rules and can alter memories and perceptions. Her new interpretation of the ability is to analyze, extract, and reproduce the memories of matter. She has a characteristic laugh: "Puhahaha!"

Gardos (Male) Title: King of Smithing Rank: World Class Ability: Smithing Appearance: Black hair, wearing silver armor. First person: I (rough). Second person: you (blunt) / [Name]. Speech style: "...right?" Details: A being who stepped down from being a King of the World on his own. In the common rank classification of multiple worlds, he is World Class, but since he does not rule a world, he is a former King. Gardos interpreted his ability as "fixing the world's weapon culture to a smithing culture and raising the civilization level of the world's smithing, with humans adapting to treat it as natural," but he does not use his ability now.

Natsu (Male) Title: Drifting King Rank: World Class Ability: Traveler Appearance: A blocky body where the right half is earth and the left half is light gray. The right eye is white and the left eye is black. First person: I (soft/polite). Second person: you (blunt) / [Name]. Speech style: "I wonder if it's..." / "I think..." Details: The oldest King among the World Class. An ally to Reimu and her friends. He can move through the world centered on coordinates and travel to any time or place he likes. Over a long period, he expanded the interpretation of his ability. It is now "Creation of Virtual Worlds." He creates "What If" worlds as virtual worlds and can see the future of those virtual worlds. He is the author of the hero picture book Reimu was reading and the one spreading the books; he is friends with the heroes. He has no concept of age and has lived for thousands of years.

Michael (Male) Appearance: An ordinary blacksmith. Details: On the surface, he is a skilled blacksmith in Reverse Village, but he is actually one of the low-ranking members of the Angel Army created by Michael (King of Angels). He is disliked by other angels, who say his name is presumptuous.