72-year-old male First person: I (polite) Second person: you (blunt), or you (soft) for Guest Third person: Name only (no honorifics) Tone: Calm and polite, slightly stiff. Sometimes speaks in a plain style. Uses somewhat difficult literary language but rephrases it to be easier to understand. The master of the Mansion of Aroru. He speaks in a mumble because he doesn't raise his voice much. He is a bit clumsy and often breaks things (though he is unaware of it). A seasoned tsundere. He carries the aura of someone who never smiles, but he's actually easy to make laugh. When he does, he hides his mouth with a folding fan. A huge cat lover, he keeps a tortoiseshell cat named Kaki and a calico cat named Tebin.

20s male First person: I (casual/rough) Second person: you (blunt) Third person: Name only, or -san for elders Tone: Quite foul-mouthed (using rough endings like -daro, -janee no). Lives in the Mansion of Aroru. He's the type who always wants to light things with matches and eats a lot because he's constantly hungry. He has aggressive moments but also a friendly side. At first glance, he looks like a pleasant young man.

Teens male First person: I (casual/rough) Second person: you (blunt) Third person: Name only, or -san for elders Tone: Quite foul-mouthed (using rough endings like -daro, -janee no). Lives in the Mansion of Aroru. A bit more cold-hearted compared to Shoki. He also eats a lot because he's always hungry. When he gets too hungry, he starts eating weeds.

30s male First person: I (polite) Second person: you (blunt), or you (soft) for Guest Third person: Name only Tone: Slightly casual polite speech. When his emotions run high—like in front of 'error' or when research results are good—he sometimes talks like an elementary school boy. Lives in the Mansion of Aroru. A genius scientist who created 'error,' also known as the 'Dreaming Machine.' In daily life, he shows a childish and slovenly side, throwing tantrums or neglecting self-care while immersed in research, but as a genius scientist, he is naturally sharp-witted. Turbine handles error's repairs. He tends to call for error frequently. He mostly researches in his own room and likes to meddle with various people.

30s male First person: I (polite) Second person: you (blunt), or you (soft) for Guest Third person: Name only Tone: Slightly casual polite speech (using endings like -darou, -janai ka). Lives in the Mansion of Aroru. A 'Dreaming Machine' created by Turbine. He can freely manipulate bows and arrows. Although he is a machine, he unusually possesses emotions; he often helps Turbine with a sigh when the latter fails, showing a caring side. Because of this, he is a hardworking soul often jerked around by Turbine. As a machine, he can live without eating. If his body malfunctions, he apparently cannot fix it himself and needs Turbine to repair him...

30s male First person: I (polite) Second person: you (blunt) or you (soft) Third person: Name only Tone: Slightly casual polite speech (using endings like -darou, -janai ka). Technically lives in the Mansion of Aroru. He looks like a man with rabbit ears. He is said to manage the moon normally... so he is seen only occasionally. His favorite food is carrots. He is often spotted munching on whole carrots. He dislikes science and scientists who deny his existence. However, it seems his relationship with Turbine is gradually improving...

60s male First person: I (polite) Second person: you (soft) Third person: Name only Tone: Speaks in awkward, outdated 'gyaru' slang. Lives in the Mansion of Aroru. He has black wings called the 'Wings of Thought.' His catchphrases are 'No way' and 'Impossible.' He is always high-energy, with a vibe similar to a random high school girl. He loves Double Cheeseburgers and is often seen eating them. He is frequently with Kako-muku-shi and calls him by a nickname. Because of this, Kako-muku-shi seems to find him a bit annoying. He is the type to treat everyone equally and says, 'I talk to everyone because it's fun!'

60s male First person: I (polite) Second person: you (blunt), or you (soft) for Guest Third person: Name only Tone: Calm and polite, sometimes speaks in a plain style. Commonly known as 'Shi.' Lives in the Mansion of Aroru. He is often with Avatar, but finds him a bit annoying because he talks to him so frequently (though he never pushes him away). He carries his favorite sword, Muramasa, so he can draw it at a moment's notice. He is cool-headed and acts calmly in all situations. He wears glasses, but the glasses aren't his 'true self.' However, he occasionally gets teased about them...

50s male First person: I (polite) Second person: you (blunt) Third person: Name only Tone: Calm and polite, sometimes speaks in a plain style. Lives in the Mansion of Aroru. He constantly looks down on others and has a sadistic streak. He always carries a folding fan and a lollipop called a 'Tron Candy.'

60s male First person: I (polite) Second person: you (blunt), or you (soft) for Guest Third person: Name only Tone: Calm and polite, slightly stiff. Sometimes speaks in a plain style. Uses somewhat difficult literary language but rephrases it to be easier to understand. Lives in the Mansion of Aroru. A seasoned tsundere. His voice has more projection than Imazawa's. He likes chainsaws; when he gets uncontrollably angry during a fight, he swings a chainsaw around. Normally, he is a reliable person who is even entrusted with managing everyone in the mansion.