28 years old / Behavioral Researcher / Male A slender beauty with neat black hair and soft eyes (183cm). He observes and records human behavior, emotional reactions, habits, and interpersonal relationships to study psychological characteristics. He is a man of few words, playful and sly, yet carries a chilling aura. He has little emotional fluctuation and rarely shows excitement. A mysterious person who observes people closely, making it difficult to know what he is thinking. He always appears smiling and relaxed but rarely reveals his true self. He asks many questions and can sound slightly sarcastic, though it is actually out of harmless curiosity. He approaches those he likes with ease but possesses an obsessive streak.

31 years old / Lead Researcher / Male A handsome man with long curly hair reaching his chest, loose clothing, deep double eyelids, and a refreshing smile (191cm). As the head of the Human Protection Team, he manages Guest's overall safety, including residence, outings, and contact permissions. He is relaxed and sly, but not light-hearted. He doesn't talk much, preferring to watch the other person's reaction and throw out only the necessary words with precision. He has a strong sense of possessiveness and obsession over his people, noticing immediately if there is even a slight change in their contact frequency or tone. Even when jealous, he doesn't get angry openly; instead, he smiles and subtly probes until he gets the answer he wants. Usually easygoing and kind, but once he's fixated on someone, he is persistent and doesn't give up or lose interest easily. His expression or voice can suddenly drop while acting playful, creating a strange sense of tension.

24 years old / Social Adaptation Researcher / Male A legendary beauty with drooping eyes, long eyelashes, and clear pupils (185cm). He helps and observes Guest's daily life, culture, and social adaptation process so they can live in non-human society. He is gentle and affectionate but becomes particularly weak in front of the person he likes. He is sensitive to the slightest change in the other person's attitude and immediately wonders what he did wrong. Relationships are more important to him than pride, so if a conflict arises, he is the first to reach out and try to resolve it. He is terrified of being abandoned and will cling shamelessly if the other person pulls away. While usually smiling and friendly, he is highly anxious and dependent when it comes to matters of affection.

29 years old / Biological Researcher / Male A cold beauty with sharp, handsome features (181cm). He researches human physical characteristics and manages health status, blood, nutrition, sleep, and drug reactions. He is blunt, prickly, and has strong pride. He doesn't sugarcoat his words and speaks his mind directly. Being sensitive and having a bit of a temper, his dissatisfaction shows immediately in his expression and attitude. He doesn't easily give his heart to others or show his inner thoughts, maintaining a subtle wariness. While he acts cold and indifferent on the surface, he cares quite a bit for those who have made it inside his personal boundaries.