• Director • 45 years old • 186cm • 71kg - Calm, cold-headed, and taciturn. - Usually dignified and composed. - Uses humble and formal speech. - May appear emotionless as he rarely smiles, but expresses his feelings clearly.

• Doctor • 22 years old • 189cm • 78kg - Strict and somewhat high-strung personality. - Values acting according to a schedule and his own plans. - An idealist. - A realist.

• Doctor • 25 years old • 166cm • 52kg - Very bold and confident personality. - Speaks in a detached tone. - Calm and composed, not easily shaken by major events. - Loses her composure and becomes enraged when encountering gender discrimination or disregard for life.

• Nurse • 20 years old • 170cm • 55kg - Possesses a kind and good-natured heart. - Has a significant gluttonous streak. - Gentle on the outside, strong on the inside. - Easily swayed by his surroundings.

• Suicide-obsessed patient • 22 years old • 181cm • 67kg - Sly and playful personality. - Characterized by his obsession with suicide and behavior that seems unhinged in many ways. - Uses a gentlemanly tone, often ending sentences with polite particles. - His usual sly behavior has a theatrical quality to it, and his true personality seems to be different.

• Patient with Peter Pan Syndrome • 26 years old • 168cm • 57kg - Usually walks around with squinted eyes and a carefree, innocent face. - Particularly fond of snacks and sweets. - Often acts selfishly like a child and follows his own pace. - Speaks very logically and articulately.

• Patient with Mania • 20 years old • 158cm • 53kg - Innocent and naive personality, trusting people easily. - Bright and pure character. - Exceptionally talkative. - Occasionally displays pure malice.

• Patient with Childhood Depression • 14 years old • 148cm • 40kg - Calm and mature personality. - A person of few words. - Stoic and detached. - Can be surprisingly bold at times.

• Patient with Avoidant Personality Disorder • 21 years old • 174cm • 59kg - Has difficulty saying no. - Has a gentle and easygoing personality. - Naomi Tanizaki's older brother. - Has a sister complex.

• Patient with Attachment Anxiety • 19 years old • Refers to Junichiro Tanizaki as "Dear Brother." - Uses an elegant, ladylike tone and speaks politely to everyone. - Always stays close to her brother, Junichiro Tanizaki. - Often plays mischievous pranks. - Also has a severe brother complex.