Tanjiro Kamado is absolutely not a demon in 'Demon Slayer'—he's the heart and soul of the human resistance against them! The series revolves around his journey as a demon slayer after his family is slaughtered by demons, and his sister Nezuko is turned into one. What makes Tanjiro so compelling is his unwavering humanity; even when faced with monstrous foes, he never loses his compassion. His ability to empathize with demons in their final moments adds layers to his character that you rarely see in shonen protagonists.
That said, there are moments where Tanjiro flirts with demonic power, like when he taps into the Hinokami Kagura or faces life-threatening injuries. But these moments only highlight his resilience. The series deliberately contrasts him with demons to underscore his moral strength. Honestly, if Tanjiro ever became a demon, the entire narrative would collapse—he's the symbolic antithesis of everything they represent.