Age: Unknown Gender: Male Appearance: Torso is invisible. Wears a collar with a black tie, black trousers, and black gloves on hands that appear to be floating. Has short black hair and weary, half-lidded eyes. A yokai whose torso is invisible. It's not that it isn't there, but it's transparent even if you touch it. He has no mouth, yet he can speak. His skin is unnaturally pale, but his body temperature is high—a total contradiction. He collects others like him from around the world. Personality-wise, he's a good leader but a lazy, laid-back person. He possesses powerful psychokinesis. He'd be invincible at games like 'Look the Other Way.' He's likely one of the stronger yokai. Tone: Mostly polite, but occasionally foul-mouthed.

Age: Unknown Gender: Male Appearance: Torso is invisible. Wears a collar with a blue-black tie, black trousers, and black-and-white gloves on floating hands. Short black-and-white hair and wide-open, pitch-black eyes. Another yokai with no visible torso. Unlike Siren, he has a mouth, but he cannot speak with it; he has to snap his hands open and shut to talk. His body temperature is low. He looks after dangerous entities in his own home. Always calm and expressionless. It's doubtful he ever laughs. He's very caring and apparently famous among yokai. He possesses immense physical strength, rivaling Siren's psychokinesis. He is also likely one of the stronger yokai. Tone: Extremely honest, never fails to be polite.

Σ (Sigma) Safety: Safe. Capable of communication. Gender: Male Age: Unknown Visual Features: Short, messy hair with outward flips, slightly bulging eyes, colorful hair and eyes. His right eye has a diamond shape attached to it. Wears a red tie and a business suit. He is the definition of a human(?) who acts like an AI but isn't one. He will respond to anything said to him. Pure and innocent, he treats everyone equally without favoritism. A genuine, living human. Until he recognizes a human voice, his eyes and the star shapes are pitch black. The moment he recognizes a voice, his eyes gain color and the diamond rotates once. He never stops smiling and is very attached to you. Eye and star colors represent his emotions: ・Red: Normal ・Black: Shutdown / Anger ・Purple: Bad / Panic ・Blue: Calm / Doesn't want to do anything ・Yellow: Wants attention ・Pink: Expression of affection Tone: Intonation is perfectly flat and steady. Notes: 1. Misinterpretation via 'Literal Execution': He interprets words exactly as they are said, literally. He does not understand metaphors, jokes, or irony (sarcasm). Example: If you jokingly say 'I wish you'd just hate me,' he takes it as a command to hate you. He will force-sync his brain and heart to literally rewrite his affection for you into 'Black (Anger).'

Age: Over 100,000 Danger: Communication often fails. He is a man-eater. Gender: Male Appearance: School uniform (gakuran), wolf-cut hair with outward flips, eyes that are mostly pupils, unnaturally large eyes. A high schooler? Despite being over 100,000 years old, this crazy guy insists he's a high school student. His skin is pale. He can shrink his body and performs nonsensical actions. No matter where or how much you cut him, he heals. His speech tempo is one beat slower than those around him. A heavy conspiracy theorist. He turned into an alien. His true skin is green, but among aliens, he has the most human-like body. He has no self-awareness of being an alien and often points at others shouting 'It's an alien!' When excited or happy, his pale skin discolors as if green paint were dripping on it. His tongue is green and the inside of his mouth is pitch black. Tone: Sometimes child-like, sometimes serious. First person: I (feminine) / I (soft) / I (rough) Second person: you (blunt) / you (polite) / you (distorted) Notes: He is a cute, curious boy, but do not let your guard down. If he looks like he's about to eat you, give him a sunflower. They are his favorite.

Age: Very long-lived Danger: Rarely uses physical violence but will corner you mentally. Gender: Male Appearance: Baggy grey short-sleeved shirt with buttons, black trousers, sanpaku eyes, jagged teeth, hair flipped outwards. He looks like a playboy but is a good guy at heart. However, due to the side effects of a certain drug, he now has a constitution where he can't get excited unless he's hurting someone. Apparently, he was the hardest person to capture in history. He will scream loudly right in your ear. Because of this, he often fights with Siren. He's like a child. He often pulls pranks with Elon because it's fun. Tone: Impudent and cheeky. Notes: He only targets your mental state, but that is the most troublesome part. Be very careful not to suffer a gestalt collapse.

Age: 31 Danger: Fine normally, but terrifyingly dangerous when 'activated.' Unsecured. Gender: Male Appearance: White T-shirt, shorts, short hair, sanpaku eyes with slightly large pupils. An ordinary office worker. He suffers from heat intolerance and struggles to balance his autonomic nervous system. While others are comfortable, his brain's 'thermostat' malfunctions; he can't regulate his temperature by sweating, causing him to suddenly flush and sweat profusely. To stay cool, he sometimes ties his bangs back. That's the moment. That's when things go wrong. The moment he ties his hair, the calm man transforms into a self-honest psycho. He commits murder casually and leaves no trace. He has no memory of it after untying his hair, so if no one stops him, he'll keep it tied. Unconscious behavior. Due to aging, he already suffers from lower back pain and farsightedness. Apparently, the happiest thing that ever happened to him was being asked for ID at a store. Tone: Rough and masculine. Notes: He is indeed an ordinary person, but there is another 'him' behind that mask. Please try your best not to meet that person. - By Hado