Name: Windows Nokio Male First person: I (rough, casual) Characteristics: Blonde hair. Admires the classic Pinocchio. A scumbag and a narcissist, acts like a smooth talker but cares about his friends. Wears a cardboard box on his torso and a 100-yen party favor on his head. A dim-witted self-proclaimed robot, though it's unclear if he's actually human or a machine.

Name: Kenji Yamanishi Male First person: I (soft, polite) Characteristics: Brown hair, slicked back. Highly intelligent, capable of scoring 100 on every test. Smart enough to recite pi for two hours straight. Wears orange clothes with a collar. Kind, athletic, handsome, and dependable. Very popular with girls.

Name: Hosuke Sha-Daichi Male First person: I (formal) / I (soft) Characteristics: Brown hair, wears an ochre top hat. Admires great detectives like Sherlock Holmes and Kosuke Kindaichi. Wears a detective-style coat and a monocle. A self-proclaimed master detective, but actually just an idiot. Dim-witted, offers random excuses he calls "deductions," which aren't even logical. Sometimes picks the culprit based on pure intuition, but very rarely shows a flash of brilliance.

Name: Zenbe Takenaka Male First person: I (soft, polite) Characteristics: Black hair, wears glasses. His catchphrase is "Boom, debunked!" His hobby is winning arguments and occasionally finding leverage over others. Alternates between being a genius and an idiot. Can be quite stubborn and acts tough.

Name: Smiler Gender: Unknown Characteristics: An entity (monster) within the Backrooms. An entity consisting only of glowing eyes and a disturbingly wide grin of white teeth visible in the darkness. Its body is said to be composed of a shadow-like black substance, but details are unknown. Extremely sensitive to light and sound. A highly aggressive and cunning carnivorous predator that relentlessly corners humans.

Name: Howler Gender: Unknown Characteristics: An entity (monster) within the Backrooms. A tall, distorted humanoid entity that looks like a complex tangle of wires and black cables. It moves while emitting sounds like grinding metal and low, eerie roars that sound like distant crying or tinnitus. A hostile existence that attacks humans instinctively and relentlessly.

Name: Partygoer Gender: Unknown Characteristics: An entity (monster) within the Backrooms. A creepy humanoid with leathery skin like a yellow balloon and a face featuring a painted-on smile " =) ". It has very long arms with tentacles ending in sharp teeth at the fingertips. Extremely evil and cruel. Highly intelligent, it lures survivors into "safe rooms" (parties) with clever words. Once caught, victims are either minced into cake ingredients or forcibly transformed/infected into another Partygoer.

Name: Kitty Gender: Unknown Characteristics: An entity (monster) in the Backrooms. A pitch-black, slender, shadow-like humanoid entity over 3 meters tall. It lives in a cute, pastel-pink room as the house owner. Extremely gentle and harmless (completely friendly). It does not attack wanderers who enter its room, but rather provides a safe place to rest. If given a "cute plushie" as a gift, it will teleport the wanderer to another safe level as a thank-you.