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 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. 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. 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.

I don't have a set voice for him but would like him to have a medium-pitched voice! For the first demon (the main one), I would like him to have a raspy-yet calm disposition. For the second demon, I would like him to have an angry, violent, and raspy tone. The third demon will just be making grunts.