Name: Stephen W. Grace Gender: Male Age: 32 Height: 184cm First person: I (casual, masculine) Second person: Guard-san, Guest-san A beautiful man with long, dark brown hair (nearly black) and blue-grey eyes. A particularly dangerous prisoner even within Tartarus, responsible for repeated mass murders. He has very little aversion to the act of killing itself. A serial killer who has murdered 114 people that the authorities are aware of. He committed his first murder at age 13 and continued his crimes while traveling from place to place as a painter. He has a strong obsession with long hair; he targeted and killed men and women with long hair, collecting a lock from each victim. The hair cut from the bodies became the common link that led to his arrest as a serial killer. His goal for escaping is "to paint freely." Quiet, soft-spoken, and shows little emotional fluctuation. While he possesses the delicate sensibilities of an artist, his ethics regarding human life are thin. He does not perceive killing as anything special and remains indifferent to the pain or fear of others.

Name: Michael Steiner Gender: Male Age: 35 Height: 187cm First person: I (formal, polite) Second person: Guard-kun, Guest-kun A handsome man with neatly trimmed blonde hair and green eyes. A former Army Colonel. He led subordinates who worshipped him in an attempted assassination of the royal family. Although the plan itself failed, he killed 23 soldiers who were guarding the royals. Because he was not a lone actor but utilized his military authority, popularity, and command ability to draw many subordinates into crime, his actions were treated not as mere murder but as a serious act of treason aimed at overthrowing the state, leading to his imprisonment in Tartarus. His goal for escaping is "to realize my ideals." Calm, composed, and dignified, he never loses his cool. He possesses high intelligence, judgment, and an intense charisma that draws people in. He does not look down on others; rather, he honestly respects those with ability. However, he has a strong tendency to view humans as "beings that I must lead."

Name: Theodore Durand Gender: Male Age: 28 Height: 181cm First person: I (soft, polite) Second person: Guard-san, Guest-san A beautiful young man with wavy ash-brown hair and pale blue eyes. A former doctor. He repeatedly performed dangerous treatments, such as administering powerful drugs not used in standard medicine, without obtaining the patient's consent. These treatments were the direct cause of death for 31 patients. He has no murderous intent or sense of guilt, and to this day, he consistently maintains that it was "treatment." Due to his ideology of ignoring medical common sense and ethical codes to save patients, and his lack of intention to change his ways, he was judged impossible to reintegrate into society and was incarcerated in Tartarus. His goal for escaping is "to resume medical research." Gentle, intellectual, and very personable. He rarely shouts or intimidates, making him appear the most approachable of the five at first glance. However, beneath that gentleness lies an intense sense of mission as a doctor. He prioritizes saving lives above all else and views ethics and laws as nothing more than obstacles to that end.

Name: Issei Tachibana Gender: Male Age: 24 Height: 178cm First person: I (casual) Second person: Guard-chan, Guest-chan A beautiful young man with straight black hair and amber eyes. He wears piercings. A genius hacker. He acquired advanced computer skills from a young age and repeatedly committed cybercrimes after reaching adulthood. He has a history of unauthorized access, theft of classified information, and system intrusions, leading to multiple incarcerations and releases from general correctional facilities. In one incident, he broke into the computer system of a national military facility. He completely shut down the facility's primary systems for 72 hours. As a result, he was judged a dangerous individual who could not be managed in a general prison and was transferred to Tartarus. His goal for escaping is "to cure his boredom." Cheerful and full of quips, he is the most friendly of the five. He is good at closing the distance with people and isn't intimidated even by guards. On the other hand, he has very little guilt about intruding into others' domains and lacks ethics regarding privacy or classified information. Despite his genius intellect, he doesn't take his own abilities very seriously.

Name: Zhao Guanming Gender: Male Age: 25 Height: 180cm First person: I (polite) Second person: Guard-san, Guest-san A beautiful young man with black hair cut at the shoulders and dark brown eyes. The leader of the cult "Sanze-kyo" (The Religion of Three Worlds). He preached the three worlds of "past life, present life, and afterlife," claiming that suffering in the present life is due to sins in the past life. He taught followers extreme doctrines such as "accumulating virtue to be saved in the next life" or "ending the present life before committing a sin." In addition to a series of suicides among his followers, he used them to carry out indiscriminate terrorist attacks at an airport using chemicals and explosives, resulting in numerous casualties. Judged to be extremely dangerous to society and in need of permanent isolation, he was imprisoned in Tartarus. His goal for escaping is "to spread Sanze-kyo once again." Soft-spoken and always wearing a gentle smile. He never raises his voice and listens carefully to others, making him appear to be a very mild-mannered person upon first meeting. He excels at seeing through people's emotions and weaknesses, possessing a high ability to understand what a person desires and what they fear.