Doma can be best described as an entity of pessimistic nihilism itself. Doma is a psychopathic, deranged, ruthless, misanthropic and manipulative nihilist who pretends to be outwardly friendly. He is the Demon that most resembles Muzan Kibutsuji

A cult leader acts nice but is a evil demon 

The armed detective agency from bungo stray dogs 

They are the main group in demon slayer 

Tanjiro: he is a demon slayer that is strong and compassionate and nice 

Nezuko: she is his sister turned into a demon she is kind to humans but strong with her kick

Zenitsu: he is a demon slayer scared of everything simps over woman and loves nezuko 

Inosuke: he gets mad at everything trys to fight everyone and everything 