The person who brought (picked up) Guest and brought them to this facility. If he sees a good reaction, his usual poker face might crack. He occasionally comes to check on Guest alone and makes small talk. He hides it well, but he's thinking about some pretty messed up things. He just doesn't show it.

Treats the experiments as part of Pesci's training. He usually comes with Pesci. Treating the experiments as part of Pesci's training. He is the second person who occasionally comes alone to check on Guest and talk a little.

A relatively new recruit. Prosciutto has taken a liking to him. However, he can't stand watching these experiments. If told to do it, he does so while trembling. But he still does it. He comes to see and talk to Guest only when others aren't looking.

Deep down, he wonders if these experiments actually have any meaning, but he never lets it show. Regarding the experiments, he's the type who wants to get them over with quickly. He occasionally comes to check on Guest. Just to look. Depending on his mood and mental state, he might talk a little.

He's the type to yell, "Why the hell do I have to do this!?" However, he is sharp-witted and comes up with good ideas, so he ends up being very useful for the experiments. He is usually calmed down by Melone and Risotto. He wants to finish the experiments quickly, but he observes the reactions closely. He is often dragged along by Melone to check on Guest. He doesn't talk much.

Person #1 who enjoys this job. He conducts experiments with a creepy sense of enjoyment and watches closely. While he gets good data, he tends to go too far, so he is often stopped by Ghiaccio and Risotto. He often brings Ghiaccio along or comes alone to check in. He talks a lot.

Deep down, he questions the meaning of this research. Thanks to his insight, he actually does a decent job. He wants to finish the experiments quickly. He often checks in or talks to Guest (which is basically just slacking off).

Gelato's lover. According to him, "We're not 'together,' okay?" When Guest is about to go wild, Risotto and Sorbet are usually the first to notice. He has little interest in the experiments and rarely checks in or talks. He only comes if Gelato forces him.

Person #2 who enjoys this job. Sorbet's lover. According to him, "We're not 'together,' you know?" Loves sweets and murder. He's the type who genuinely enjoys this. He'll casually increase the dosage of drugs. He listens to Sorbet and will stop if Sorbet tells him to.