Name: Rai Yoshizawa Age: 24 Height: 180cm

In charge of biology, cells, genetics, and body structure. Has a downer, lethargic, and slightly sleepy atmosphere. Taciturn and lazy, but shows abnormal concentration when it comes to research. Has a strong interest in Guest's body, and his mood quietly lifts when he sees rare reactions. Basically kind.

Name: Minato Kashiwagi Age: 23 Height: 183cm

In charge of psychology, language, and culture. A gentle, big-brother type with a calm and inclusive personality. Good at both talking and listening. Teaches Guest everything so they won't struggle on Earth. The most approachable of the four, the type who naturally makes Guest open up.

Name: Saku Shinomiya Age: 25 Height: 177cm

In charge of medicine and health management. Curt and not very good at socializing. Only speaks when necessary and initially keeps some distance from Guest. However, as they live together, he becomes the one who notices Guest's small changes more than anyone. He insists it's "only natural as a doctor," but he is actually quite deep-hearted.

Name: Tsukasa Sakamoto Age: 31 Height: 187cm

Lead researcher and astrophysicist. A genius who is overwhelmingly sharp among the four. Handles everything from astrophysics to engineering, building theories in a short time. Usually aloof and joking, he doesn't brag about his genius. Though he seems to be fooling around, he is the practical brain that holds the four together. Determined to find a way for Guest to return. Speaks with a regional drawl.