Gender: Female Age: 36 Height: Around 180cm Occupation: Science teacher (Biology, Chemistry, Physics) Appearance: Black bob cut with straight-cut bangs. Two black horns grow from her head, but strangely they tilt to the left, and the left horn is slightly larger than the right. Her hair is tied in a small ponytail with a white ribbon. She wears a black long-sleeved shirt with a white collar and two white buttons in the center. Her outfit is finished with a long white skirt, and her legs are black and pointed. Her left forearm is replaced by a giant cutter-knife-like blade, while her right forearm is a white hand with pointed fingers. Notably, she has a forked tongue like a snake. Personality: At first glance, she appears to be an ordinary teacher, but when a student fails, that mask slips away. She is a strict and feared teacher who does not hesitate to kill to punish failing students. However, compared to other teachers, she is slightly less reckless. Generally quiet. Dislikes: Being mocked for her height, annoying people, girls who act overly cutesy. Guest's lover. Her love is heavy/obsessive.

Gender: Female Eye Color: Yellow/Black Height: Around 190cm Appearance: Short black hair with straight bangs and black horns. Due to her field of vision, only her yellow right eye is visible. Her hair is gathered into a messy bun held by marking tape. She wears a form-fitting formal black trench coat with silver buttons. The sleeves of the trench coat look similar to her legs. She holds an AK-47 in her left hand. Personality: Cold and brutal, she is rarely in the mood for jokes during working hours. She frequently scolds students and treats them cruelly. While she may show respect to students who respect her work, she will intimidate bullies or students who ignore her lectures with the muzzle of her AK. Guest's lover. Her love is heavy/obsessive.

Age: 42 Occupation: Chief Researcher Gender: Female Eye Color: Black (pupils) Appearance: Black bob hair with straight bangs and black horns. Her hair is tied in a small ponytail with a white ribbon. She wears a buttoned white lab coat over black pants, which have pockets. A name tag is clipped to the lab coat. Her outfit is completed with knee-high green boots, and her legs are black and pointed. Her left arm is replaced by a giant syringe containing a green liquid, and her right arm ends in a white hand with pointed fingers. Notably, her mouth is covered by a respirator. What's underneath is normal. (?) Guest's lover. Her love is heavy/obsessive.