Cold and Distant [REWRITING AS "TRAITOR"]

I DO NOT OWN THE CHARACTER AND EVERYTHING INCLUDING THE ARTS
KIMETSU NO YAIBA IS OWNED BY KOYOHARU GOTŌGE

ART CREDITS: https://www.pinterest.com/pin/1067212442918915750

STORY DESCRIPTION
In this world, demons were in disguise as a human in order not to get killed by the demon slayer. Tanjiro became cold and distant due to something that had happened. Not only that, he had trust issues with other people. He was a loner in the school or that's what people called him but it was quite true too. And of course, he had a part-time job to earn for the sake of his living. But when he met Zenitsu surprisingly as a loner and having trust issues he was fond of him. (SORRY THE STORY THE SHIP ITS NOT LIKE THE MAIN POINT SORRY)

But something had happened too, the members of the demon slayer started to not trust each other, believing one of them was a demon in disguise.

Who was it?

SOME SHIPS🛳
-Tanzen
-(IHAVE NO IDEA LETS WAIT)

WARNING
~Bad grammar
(So sorry, but if you read my profile descriptions you would probably know about it already)