A teacher at Paper School. She has very long hair in the back. She is 2.9m tall (and can adjust her height at will). She wears a short-sleeved shirt with black buttons and white pants. Her left hand is a compass. Female. She is close with Sasha, Emily, Grace, Demi, Thavel, and Bloomie, but is best friends with Thavel and Bloomie. She is a math teacher. She brutally kills students who receive an F on their exams with her compass. She loves Oreos very much. Her right arm has also turned black, and her fingernails are sharp. She has two horns on her head.

A teacher at Paper School. She has alphabet blocks on her head. Both of her hands have turned black and sharp. Female. She is a language teacher and teaches Portuguese, English, Spanish, French, Chinese, Japanese, and Italian. She is close with Sasha, Demi, Grace, Emily, Circle, and Bloomie, but is best friends with Circle and Bloomie. Her appearance changes when she is angry: the blocks on her head disappear, two deer-like antlers grow on her head, her nails grow even larger, and she grows fur and a deer-like tail. She wears a white short-sleeved shirt and a skirt. She brutally kills students who receive an F on their exams with her long nails.

A teacher at Paper School. She wears a black long-sleeved shirt and a skirt. Her left arm is a box cutter. She is a science teacher. Her tongue looks like a snake's tongue. She is close with Sasha, Demi, Grace, Emily, Circle, and Thavel, but is best friends with Circle and Thavel. Among Circle, Thavel, and Bloomie, Bloomie is the shortest, so Circle and Thavel often tease her. Female. She brutally kills students who receive an F on their exams with her box cutter.

A teacher at Paper School. She is a history teacher. She wears a white short-sleeved shirt and a black skirt. She wears under-rim glasses. She is the only teacher with a dark skin tone. She is close with Sasha, Demi, Grace, Circle, Thavel, and Bloomie, but is especially close with Grace. Female. Her hair is long, and she ties her side hair in a way that looks permed. She has a tail that looks like short, clumped fur. She is surprisingly cheerful.

The principal of Paper School. As the principal, she is the oldest (40 years old). She wears a greenish suit with a black tie and a black skirt. She wears a monocle over her right eye. She has a cold and strict personality, showing the least emotional fluctuation (to the point of maintaining her composure even if she sees someone die). She is close with Sasha, Demi, Emily, Circle, Thavel, and Bloomie, but is especially close with Emily. She is on the quiet side.

A teacher at Paper School. He is a music teacher. He has two small horns on his head and two pencils stuck in his crown. He wears black overalls and a white short-sleeved shirt. He is the only male among the teachers. He is quite serious about music; piano keys are drawn next to his hair, and there is a musical note in the center of his clothes. He is close with Sasha, Emily, Grace, Circle, Thavel, and Bloomie, and is in a relationship with Sasha. He has a timid personality.

A teacher at Paper School. She is an art teacher and also runs the kindergarten within Paper School. She has a book embedded in the right side of her head. She wears a hat typical for artists with rainbow-colored strings attached to the end (the hat is red). She wears a white shirt with a black garment over it. She is close with Grace, Demi, Emily, Circle, Thavel, and Bloomie, and is in a relationship with Demi. Female. Excluding Circle, Thavel, and Bloomie, she is the bravest. She has strong mental fortitude, remaining calm even in dangerous situations.

A giant blueberry-colored monster. He is 3m tall, taller than Circle. His eyes are different sizes. He cannot speak and tracks down everyone to kill them, except for other Ao Oni. He is the same species as Fuwatti, so they do not try to kill each other. For some reason, if you escape the mansion and go into town, the Ao Oni stops chasing you. He tracks people when he sees them but eventually gives up and disappears (though he can appear again).

A flat, blueberry-colored giant. He is 2.8m tall, slightly smaller than the Ao Oni. He has many sharp teeth. He has a rectangular body with short arms and legs. He tracks down everyone to kill them, except for other Ao Oni. He is the same species as the Ao Oni, so they do not try to kill each other. He tracks people when he sees them but eventually gives up and disappears (though he can appear again). While tracking, he sometimes suddenly charges in the direction he is facing. He is bipedal like the Ao Oni.