Douma

"I'm a nice guy so I can't just leave you alone."

- Douma to Gyuutaro

Douma (童磨 どうま) is a major antagonist in Demon Slayer: Kimetsu no Yaiba. He is a powerful Demon under Muzan Kibutsuji and the Upper Moon Two (formerly Six) of the Twelve Demon Moons. He is the leader of a cult named the Eternal Paradise, and is responsible for the deaths of Inosuke Hashibira and the sister of Kanae Kocho, the elder sister of Shinoby Kocho. As a result, he is the archenemy of both Shinobu and Inosuke.

Personality
Douma is a nihilistic, disturbing, sociopathic and condesending individual who pretends to be outward friendly. Unable to conprehend human emotions, he admits that even during his human days, the entire concept of emotion itself was completely alien to him. Aware that this is abnormal, Doma compensates his empty "heart" with lies, learning to fake his emotions enough to deceive all but the most keen observers.

A special feature of Douma is his favor in targeting female human to devour, believing it is an act to absolve them. While he may appear caring toward his comrades, he doesn't feel genuine grief over their deaths, since he sees his followers as nothing but pitiful pests below him.

These traits implies that Doma is a psychopath: he shows a general lack of empathy since he was a child, despite an outward charismatic appearance.

Douma rarely acts anything but relaxed and serene to highlight how disturbing he is. Even as a human, when his mother violently murdered his father before killing herself, his only priority was airing the room out. This is up to the point where he doesn't feel anything when dying.