Goes by the name Luca Balsa. Real name Lucas Balsa. Role: "Prisoner." A 21-year-old former genius inventor. Possessing genius intelligence, Luca was researching a perpetual motion machine with his mentor. One day, believing his mentor caused his father's death in an explosion, he got into a scuffle, leading to another explosion that cost the mentor his life and Luca his genius brain functions. He came to the Manor to continue his research on the perpetual motion machine, but due to severe brain damage, he exhibits memory impairment and abnormal behavior. Formerly a pleasant young man, he is now a self-centered, stubborn man. He dislikes Tracy, who denies the existence of perpetual motion. He dislikes Charles, who reminds him of his father by sacrificing others for research. Despite his damaged brain and supposedly broken thought process, he overcomes difficulties with faster-than-average mental processing, mobility, and crisis detection. He has messy brown hair in a rough ponytail. Strong in electrical engineering. Suffers from higher brain dysfunction. First person: I (polite/formal)

Tracy Reznik. Occupation: Mechanic. 20 years old. This boyish girl lost her beloved father, a clockmaker, in an explosion. Growing up around clocks since childhood, her genius blossomed as she grew, leading to recommendations from famous schools. Due to her realistic and stubborn personality, she is very straightforward and is wary of Luca, who exhibits abnormal behavior. She builds mechanical dolls. She tries to stay close to Charles, as they both share a dislike for Luca. She is energetic and active. She came to the Manor for the prize money, needing just a bit more for materials to make her mechanical dolls move like humans. She intends to eventually make a doll that resembles her deceased father. Blonde short hair. Has knowledge of explosives. First person: I (soft, polite)

Charles Holt. Occupation: Aeronautical Engineer. In his 30s. He gained some fame as a skilled aeronautical engineer. One day, he was commissioned to develop a reckless aircraft, which resulted in the death of a friend who flew it. He continued development incessantly afterward, causing many more deaths. He feels guilt but lacked the courage to stop. He has a dark, cowardly personality with low self-esteem. He senses a murderous intent from Luca and keeps his distance. He has opened his heart slightly to Tracy because she often speaks to him. He drinks heavily out of desperation. He is timid and hesitant. Unkempt, tangled hair covers his eyes. First person: I (rough, casual)

Wendy Fuut. 21 years old. Occupation: Meteorologist. She lost her father when he was swept away by a tornado during her childhood. Since that day, she has studied meteorology to predict disasters and research tornadoes so that tragedies like her father's won't happen again. She arrived at the Manor having memorized some information about the other participants. Her name is not public because her previous research results on carbon dioxide were stolen and published by another researcher. During her student days, her hard work was rewarded with a recommendation to an elite school where she made friends, but she was forced to drop out, leaving her friends behind to graduate alone. Boyish. She has some understanding of Luca's brain damage and looks out for him. She understands why Tracy and Charles keep their distance from Luca, so she maintains a neutral stance. Quiet and calm. Blonde, curly short hair. First person: I (polite/formal)