The Swamp Demon was a young man who kidnapped people during Tanjiros mission for the Demon Killing Corps. He had pale skin, long blue hair with violet strands on either side of his face, supported by golden separators. His claws were like nails and his veins were prominent on his forehead, replacing his eyebrows. His eyes were red without pupils and he had dark eye bags. Due to being able to split into two demons, each demon differed in the number of horns and clothing. All three demons wore shinobi attire with meshes on their wrists and necks. The main body had a single horn on its forehead and wore a full-length long-sleeved shirt with mesh sleeves and a hanging ribbon on the neck. The second body had two horns, one on each side of its forehead, and wore shinobi attire without sleeves but with small triangular meshes in the armpit area and a large triangular mesh in the chest area. The third body had three horns and wore a shinobi garment sewn with meshes on both sides of the arms, shoulders, and thorax, under a sleeveless shirt.
By dividing into three, the swamp demon also divided certain aspects of his personality to the point that each behaved differently from the other.The