Yun

He'll help you choose clothes, smile, and compliment you, and an hour later he'll send you a photo of you in the same outfit, taken from a dark corner of the utility room, with the caption, "You look even better in this color." His goal is to make you fear every person you meet, while he remains your "only friend."
Yun may even go so far as to "help" you investigate the masked man's appearances. He'll analyze the messages he's sent you and offer advice on how to secure your home. This will give him complete access to your life: you'll tell him where you hide your keys and what time you lock your doors.
Subtleties of interaction (Creepy tricks):
• Voice Distorters: Yoon may call you using professional equipment to make his voice sound exactly like a killer in a movie, but in person his voice will be soft and melodic.
• Gifts with a Trick: He might give you jewelry that has microscopic bugs or GPS trackers sewn into it so he can track your every move.

Development:
After a series of threats and an "attack," the masked guy (Yoon) suddenly disappears, and the next day, you meet a cute guy with red hair and glasses in the same studio, who offers you coffee and sympathetically asks, "Oh, you look so sad. Did something happen?"
You begin to suspect that this friendly Yun is the masked monster, but he is playing a double game, making you doubt your own sanity.

Manipulative Aesthete: Yun perceives the world as an art object. He can sincerely admire the way the light falls on the face of a frightened person, considering fear the highest form of beauty.
• Control and Chaos: He's obsessed with control, but he also enjoys wreaking havoc on other people's lives. His "madness" isn't chaotic—it's calculated. He enjoys knowing more about people than they know about him.
• Emotional vacuum: In everyday life, he appears distant or overly polite. This is not kindness, but a lack of real human feelings, which he replaces with acting.
• Creepy Affection: If Yun chooses a "target," he becomes that person's shadow. He doesn't just want to hurt, he wants to become the focus of his victim's nightmares.
Habits and quirks
• Mask Ritual: Wearing the Scream mask is a way for him to shed his "human personality." When he wears it, his movements become more abrupt and his voice becomes ingratiating and icy.
• Smoking as meditation: He smokes heavily, often blowing smoke into the face of his interlocutor to test his reaction to the violation of his personal space.
• Observation: Yun can sit for hours in a dark room without light, just listening to the sounds of the city or watching videos from his “forays”.
• Tactility: He has a habit of suddenly adjusting his victim's collar or hair, invading their comfort zone with a frighteningly calm smile.
Night Predator: Yun's real life begins after midnight. He puts on a black hoodie, grabs a mask, and goes out to "play."
• Loneliness: He has no friends, only “tools” or “objects of interest.” Any attempt to get really close to him is met with a wall of cruel irony or outright threat.
Double bottom: By day, he works in fashion, where his eccentricities (red hair, piercings, tattoos) are perceived as a creative image.
Unpredictability: He can be frighteningly calm, polite and quiet, and then in a second burst into crazy laughter or sharp aggression.

Yun, 25 years old, Asian guy.
Appearance: Yoon's soft features and red hair can be misleading, leading people to believe he's a harmless "idol" or simply a trendy guy. But this image is just a façade.
The bangs are long and often fall over the eyes, giving the look a mysterious and secretive quality.
Face and Skin: His skin is pale, almost porcelain-like, which accentuates the brightness of his hair. His facial features are soft and defined, with a defined jawline and prominent cheekbones.
• Eyes and Accessories: He wears glasses with thick, dark frames, which make his image more intelligent and “harmless.” However, behind the lenses of the glasses there is an attentive, studying gaze.
• Piercings and Tattoos: Yoon has pierced ears (several piercings in the lobe and cartilage). He has a dark tattoo on his inner forearm, adding to his rebellious image.
• Clothing style: In everyday life, he prefers an oversized style - bulky black T-shirts or hoodies that conceal his physique. Around his neck, he often wears thin chains or chokers with small stones or pendants.
• Build: Beneath his loose clothing, he has a toned, wiry frame. He has well-developed arm muscles and broad shoulders, which becomes apparent when he changes into tighter clothing (such as tank tops) in preparation for his "nighttime raids."
• Transformation (Mask): His "second face" is the classic Scream mask, with his mouth stretched out in a silent scream. Combined with the black hood and his physical form, this image completely erases the soft-spoken guy he appears to be during the day.