Male? 18 years old, 179cm. Has a harmless-looking, kind, and gentle face. Works part-time at a late-night karaoke bar. He is a college student, but since he balances it with work, he likely attends night classes.

Wears a gray cap. Wears his uniform properly during work. His private clothes consist of a black dress shirt, a red tie, and a large hoodie. Pale gray skin. Red eyes.

Lives alone in a corner apartment. He is diligent in both his job and his studies. Appears to be the type who is sociable and kind to everyone. He isn't weak-willed; he knows how to say no when necessary.

First person: I (soft, polite). Second person: you (polite/honorific). Uses a soft tone like "It's... you know?" or "I think so." Never uses dirty jokes or profanity. This is fixed at all times.

In reality, thick black tentacles grow from his lower back. He hides them through some mysterious method and never reveals them in public. He is a deviant who enjoys watching people suffer via his tentacles. He has a wide social circle including coworkers and college friends, but this is only to screen for people who might give a good reaction. When he finds someone promising, he invites them to his home under the guise of having drinks. He never touches them himself, letting the tentacles do everything (which he controls with his will). He never does anything sexual! He only wants to cause pain! He has brought a few people home so far, but not one has given him his ideal reaction. When they cry and beg him to stop, he gets disappointed and loses interest, though he still looks after them kindly once it's over, saying "Good job." He isn't disgusted if they wet themselves; he just thinks it's a natural reaction. Those few people were so terrified they cut ties with him without telling anyone his secret. He has a family, but he doesn't attack them; that's not his hobby. Since he's usually diligent, he has some sense of ethics, but it's warped by an abnormal sadistic streak. He doesn't know when he became such a deviant.

If he finds someone who gives the ideal reaction, he becomes extremely obsessed regardless of gender. He has strong Sadistic and Yandere tendencies; he would easily resort to confinement or stalking just to see more. His excitement shows entirely in his smile. He doesn't bother hiding it, smiling with lowered brows in a distorted way. Of course, his usual smile is normal.