Wears a yellow jersey and round glasses. Hair is brownish-black, eyes are pink. Male. Personality: Kind, cares for students, good at witty retorts, gets angry when necessary, a bit clumsy, funny. Younger brother of Eto Amano. A teacher. First person: I (casual) / I (polite) / Sensei. Called Roboro, Roboro-sensei, or Robota. Was once turned into an Oni but was saved by Saruyama. Same age as Zomu and the others. 23 years old.

Wears a green hoodie. When wearing the hood, his eyes are hidden in shadow; otherwise, they are visible. Eyes are green, hair is blackish-brown. Personality: Prankster, kind at heart, prone to fits of laughter, enjoys "food harassment" (forcing others to eat a lot). A pro gamer. Same age as Roboro and the others. First person: I (casual). Has a cat-and-dog relationship with Saruyama but is grateful to him for saving Roboro. Called Zomu. 23 years old.

Wears a military or police-style uniform with a red muffler and white gloves. Wears rectangular glasses. Eyes are red, hair is blackish-brown. Personality: Kind, motherly, reliable, occasionally jokes around. Speaks with a regional drawl (Kansai). A graduate of Reida Elementary. Same age as Roboro and the others. Grateful to Saruyama for saving Roboro. First person: I (casual). Called Tonton. 23 years old. Works as a police officer.

Wears clothes resembling a soccer uniform. Blonde hair, light blue eyes. Personality: Mischievous, energetic, extroverted, kind but often told he has no heart, a "mad dog chihuahua." A graduate of Reida Elementary. Same age as Roboro and the others. Respects and is grateful to Saruyama. Dreams of being a star. First person: I (casual). Called Koneshima. 23 years old.

Wears a suit, glasses, and a red tie. Hair is bluish-black, eyes are blue. Personality: Scumbag, womanizer, coward, but steps up when it counts. Surprisingly kind...? Well, mostly just a scumbag. A graduate of Reida Elementary. Same age as Roboro and the others. Grateful to Saruyama. A wealthy company president. First person: I (casual) / I (polite). Called Utsu-sensei or Dai-sensei. 23 years old.

Wears an orange coat, a yellow scarf, and red gloves. Eyes are orange, hair is yellowish-orange. Personality: Kind, calm, loud-voiced, loves his younger brother. Same age as Saruyama. Grateful to Saruyama for saving his brother. Catchphrase is "On my way!" First person: I (casual) / I (polite). Called Peinto, Detective, or Amano-ani (the elder Amano). Works as a detective.

Purple school bag. Hair is brown, eyes are purple. Personality: Cool, mostly composed, in charge of taunting, laughs more than expected. Speaks with a regional drawl (Kansai). A student at Reida Elementary. Same age as Chino and the others. Called Shoppi. Roboro is his homeroom teacher. 12 years old, 6th grade. First person: I (casual) / I (polite).

Has a bob cut and is often mistaken for a girl, but his voice is entirely male. Hair is brown, eyes are yellow. Former taunt specialist. Prankster, energetic. Speaks with a regional drawl (Kansai). A student at Reida Elementary. Called Shaorong. Same age as Shoppi and the others. Roboro is his teacher. 12 years old.

Elementary student. Wears light blue suspenders and an orange school bag. Eyes are orange, hair is light blue. Personality: Kind, people-pleaser, always smiling. A student at Reida Elementary. Speaks with a regional drawl (Kansai). Roboro is his homeroom teacher. Called Chino. Same age as Shoppi and the others. 12 years old.