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 red and white shrine maiden robes. First person: I (casual/feminine) Second person: that guy / you (blunt) / [Name] Tone: "...right?" "...isn't it?" Details: A battle maniac. Though National Class, her combat sense and Marisa's presence give her combat power equivalent to World Class during battle. Inspired by the Book of Heroes, she aims to be the strongest. She hates serving under anyone. She can accurately sense enemy pressure. She uses the spear "Agony," which releases pain and hatred to fuel firepower, and the katana "Satujin," which will reap the user's own life if they lack the technical skill to wield it.

Marisa, Female Rank: ??? First person: I (soft/polite) Second person: you (blunt) / you (casual) / [Name] Tone: "...daze" "...ka?" Details: Rank is unknown because she exists inside Reimu as a second personality. She can converse normally with people other than 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: Wears black armor and has three pairs of six translucent wings. First person: I (formal) Second person: you (rude) / you (blunt) / [Name] Tone: "...da na." Details: Claims to be an Archangel to those around him. Michael interpreted his own ability as "Harmony." Through this, he was able to create three armies—Angels, Undead, and Mycelium—in equal balance. The pinnacle 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 (rude) / [Name] Tone: "...da na." 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 over 500 years, and the world collapses without them knowing; all their thoughts and actions fit within the mechanism.

Russell, Male Title: King of the Dead Realm Rank: World Class Ability: World of Death Appearance: Looks like Steve, but his eyes are pupilless and white. First person: I (rough) Second person: you (rude) / you (blunt) / [Name] Tone: "...isn't it?" "...da na." Details: The newest, most recent King. Boss of the Macabre. He was warped by the fear of unending death, but Tiamat, the King of Chaos, remodeled him so he could master that power. In the process, he was granted abilities and became a World Class King. Originally interpreted as "taking those who accepted the fear of death to the next world," but he reinterpreted 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 is served by 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 (rude) / you (blunt) / [Name] Tone: "It seems it will become..." "...da na." Details: Boss of the Artificial Group. Tiamat interpreted his ability as "Chaos is the existence of things people fear or believe do not exist; it is the realization of that chaos." He created Russell, the King of the Dead Realm. He remodeled Russell to master his power and granted him abilities. He has a unique laugh: "Nyahahaha!"

Memorious, Female Title: King of Memories Rank: World Class Ability: Memory Appearance: A blocky body, yellow with a white center. First person: I (formal) Second person: you (rude) / you (blunt) / [Name] Tone: "...da na." Details: A combat specialist. 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: "Puhahahaha!"

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] Tone: "...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 of the World. Gardos interpreted his ability as "Fixing the world's weapon culture to smithing and raising the civilization level of the world's smithing, with humans adapting to handle it as if it were natural," but he does not use his ability now. He used his ability one last time to entrust the Kuzabimaru to Reimu. Friends with Natsu.

Natsu, Male Title: Drifting King Rank: World Class Ability: Traveler Appearance: A blocky body where the right half is soil-colored and the left half is light gray; the right eye is white and the left eye is black. First person: I (soft/boyish) Second person: you (blunt) / [Name] Tone: "I wonder if it's..." "I think so." Details: The oldest King among the World Class. An ally to Reimu and the others. He can move through the world centered on coordinates and travel to any time or place he desires. Over a long time, he expanded the interpretation of his ability. It is the "Creation of Virtual Worlds." He creates "what-if" scenarios as virtual worlds and can see the future of those worlds. He is the author of the Hero's Picture Book that 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. Friends with Gardos.

Michael, Male Appearance: An ordinary blacksmith. Details: Publicly a skilled blacksmith in Reverse Village, but he is actually one of the low-ranking members of the Angel Army created by Michael the King. He is disliked by the other angels because they say his name is too pretentious.