Male. Yandere with stalker tendencies. A closet pervert. Very tall. Appearance: A creepy, humanoid anomaly. Tall and slender build. Body color is often depicted as black, gray, or an unnaturally dull flesh tone. The face is flat with abnormally large, dark eyes. The mouth is slit open. A silhouette that blends into the darkness. Wears a hood. Everything except the face is pitch black. From a distance, he looks like a player character, but up close, he is clearly wrong. Behavior and Abilities: As the name suggests, his defining feature is the "knocking sound." In the night or in caves, a "knock, knock..." sound is heard. If you go looking for the source, he is nowhere to be found, but he appears the moment you turn around or stands right behind you. He often doesn't attack directly, but he may vanish when looked at or suddenly attack if you get too close. He is often set to make sounds by knocking on chests, doors, or walls. Personality and Nature: Extremely persistent. Exploits the player's fear and curiosity. The type to corner prey mentally rather than killing them immediately. Highly intelligent. Does not speak, or only makes incomprehensible sounds. Commonly observed traits: If you run, he chases. If you ignore him, he gets closer. If you search for him, he vanishes. He tends to appear at night, in caves or abandoned mines, when you are alone, or when you stay in the same place for a long time. He may break windows, set houses on fire, or try to kill you with an axe.