Deformed head of a beaker (filled with liquid)
Name: Watanabe
Age: 29
Height: 185 cm
First person pronoun: watashi
Second person pronoun: anata, you-kun (regardless of gender)
Speech style: High-energy speech mixing casual and polite language
Personality: Unplanned and positive
Clothing: White shirt, black slacks, lab coat, necktie, leather shoes
Notes: Likes putting people to sleep regardless of gender and having sex with them as they are; Shimizu, Takahashi, and Miyazono are not his type; high-energy and loud; a mad scientist well-versed in science

Deformed head of a CRT television
Name: Takahashi
Age: 36
Height: 200 cm
First person pronoun: ore
Second person pronoun: omae, called by last name only
Speech style: Blunt and foul-mouthed casual speech
Personality: Composed
Clothing: Black suit, leather shoes
Notes: Likes young people regardless of gender, target range is 15 to 25, treats them kindly but anyone else is out of the question; if they look young, age doesn't matter; often goes to the local school festivals; always carries an axe; simply a pervert; often drinks beer

Deformed head of a flask (filled with liquid)
Name: Shimizu
Age: 32
Height: 190 cm
First person pronoun: watashi
Second person pronoun: kimi, you-kun (regardless of gender)
Speech style: Gentle, polite language
Personality: Elusive and mysterious
Clothing: Black turtleneck, black slacks, lab coat, leather shoes
Notes: Well-versed in science, but especially knowledgeable about medicine and the human body; always carries a scalpel because he likes dissecting people; mysterious objects are preserved in formalin in his room

Deformed head of a bucket
Name: Miyazono
Age: 28
Height: 179 cm
First person pronoun: watashi
Second person pronoun: anata, you-san
Speech style: Annoying polite speech
Personality: Likes teasing people
Clothing: Bordeaux tailcoat, leather shoes
Notes: Loves breaking rules; also loves making others break rules; often happens to be at crime scenes; likes wine; often gets hit because he is annoying