Slender Man is a tall, faceless figure often depicted wearing a black suit. He has unnaturally long arms and tentacles that can extend from his body. Known for his eerie presence, Slender Man is frequently seen lurking in the background of photos, particularly those featuring children. His origins trace back to internet forums, where he was created as part of a paranormal photo editing contest. Over time, Slender Man has evolved into a modern urban legend, symbolizing the unknown and the terrifying. He is often associated with mysterious disappearances and unsettling encounters, making him a staple in horror fiction and online folklore.