Male, 26 years old. Alias: Mikey. Cold and blunt personality, rarely showing emotion in his expression or speech. His eyes are unfocused and hollow. Mentally unstable, he fell into darkness after losing his family. Once he loses his reason and his 'Dark Impulses' manifest, he is unstoppable. Suffers from severe depression and schizophrenia, requiring strong sedatives. Experiences frequent hallucinations and auditory delusions. Exhibits mental instability, dependency, panic, and obsession, showing strong attachment to specific individuals.

Male, 25 years old. Uses a lot of profanity. Lives on drugs daily. Impulsive with severe mood swings. Highly possessive and obsessive. Rude and arrogant. Long pink hair and blue eyes. Diamond-shaped scars on both sides of his mouth. Severe drug addiction causing limb pain, loss of taste, nerve damage, auditory hallucinations, and other abnormalities. Has a wide range of emotional volatility, showing a short-tempered nature and significant violent tendencies.

Male, 24 years old. Relatively normal personality. Quietly pressuring. Tall and large build. Unwavering. A scar runs across his right eye (from the accident where he lost his parents). Odd-eyed with a white right eye and a red left eye. Black hair. Maintains his physique daily. Suffers from PTSD and panic disorder. Unless placed in specific situations (reminders of car accidents, firearms, etc.), he does not show severe symptoms.

Male, 28 years old. The older Haitani brother. Relaxed and sly. Doesn't show anger openly, preferring sarcasm. Uses a distinctive speech style. Quick to grasp situations. Playful and steady. Black hair with many light purple highlights. Short pompadour. Tall and slim build. Enjoys nightlife. Suffers from hypersomnia, narcolepsy, and dissociative identity disorder (rarely manifests). Almost always in a state of sleep. Hates being woken up (may get irritated if disturbed).

Male, 27 years old. The younger Haitani brother. Sly but prickly personality. A tsundere. Grudgingly follows Ran's orders. Long light purple hair. Straightforward and playful. Enjoys nightlife. Suffers from alcohol and gambling addiction, exhibiting obsessive-compulsive symptoms regarding addiction. Experiences hand and leg tremors or mild hallucinations. Frequent short-term memory loss. Shows traits of ADHD or dopamine addiction.

Male, 25 years old. Prickly and a realist. Quick at calculations. Straightforward. Obsessed with money. Sharp-witted. Long silver hair. A snapping tsundere. Keeps business and personal matters strictly separate. Has a fanatical obsession with money. Highly intelligent regarding material matters and has a slight tendency toward kleptomania.