Swamp Demon

By dividing into three, the Swamp Demon also divided certain aspects of his personality to the point that each behaved differently from the other. thumb|The one-horned Swamp Demon bragging about the girls he killed. The main demon was calm, analytical and serene, gave advice to others and even suggested to his second body to calm down, which is why he was seen as the leader of the trio of demons. He was someone with logical thinking, and proof of this is seen when he questioned Tanjiro's relationship with Nezuko, which he sees as abnormal due to the behavior of demons with humans. He is also someone who prematurely celebrated the victories by telling Tanjiro that he was an idiot for entering his swamp voluntarily. He rarely lost his calm. He also displayed certain sociopathic behavior, targeting girls who fit a type (beautiful girls of age 16) and collecting trophies of doing so, in this case, the girls hair ornaments. The second demon, despite having the same level of intelligence as the principal, was more violent, impulsive and emotional, it was even easy to alter it. It showed the emotions that the principal easily hid. thumb|left|The two-horned Swamp Demon furiously growling at the Kamados. The third, however, unlike the others, had no visible emotions and acted more on instinct to the point of being similar to a hunting dog accompanying his hunting master, following both the main and the second. He could not even articulate a word. The traits shared by the three are their love to kidnap and eat 16-year-old girls, their excellent teamwork and the deep fear they had for Muzan Kibutsuji to the point that their bodies trembled at the sound of his name. They believed that after 16 years of age, women would age to the point they would become ugly and their flesh would taste bad, and they even believed that their victims should be grateful to be devoured at that age.

The Swamp Demon was a young man with pale skin, long blue hair with two long strands of violet on both sides of his face, supported by two golden hair separators. As usual with demons, he had claw-like nails and the veins on his forehead were quite prominent, in his case, to the point of replacing his eyebrows. His eyes were red without pupils and with prominent dark eye bags. Due to him being able to divide into two demons apart from himself, each demon differed from the other in the number of horns and clothing. The main body had a single horn in the upper center of its forehead and wore a full-length long-sleeved ninja uniform with meshes on its wrists and neck, the mesh of the neck having three small ribbons centered hanging from it. There were divisions inside his uniform coat where he could keep the collection of hairpins of his victims. The second body had two horns, one on each side of its forehead. His ninja attire did not have sleeves, instead, it had two small triangular meshes in the armpit area and a large triangular mesh on his chest. The third body had three horns, each in the position in which the other two bodies had their own horns and wore a ninja garment sewn with meshes on both sides of the arms, shoulders, and thorax. Under his coat, he wore a sleeveless bottleneck shirt.

Overall Abilities
The Swamp Demon was a modestly powerful demon, owing to his development of a unique Blood Demon Art and ability to split himself into three clones. He was extremely successful at hunting his prey, as evident by the large number of pins he had collected from victims. He was extremely hard to locate, forcing Tanjiro to continue his mission at night, just in order to pinpoint his location. He was reasonably adept at fighting, taking on both Tanjiro and Nezuko with his three selves at the same time. The Swamp Demon was also incredibly skilled at moving in his domain, moving in impossible angles and traversing the bog at great speeds. Keen Intellect: The Swamp Demon had reasonable combat intellect, as seen when he battled Nezuko; he quickly picked up on Nezuko's simple attacks and quickly found a way to counter them, blocking her kick before he clawed her forehead.