Season 3 of the Demon Slayer anime, which adapts the "Swordsmith Village" arc, has recently concluded, and it's been an exhilarating ride for fans as they've witnessed the gripping events as two Upper Moons attack the village. This season has delivered not only some of the series' most intense battles but also unexpected revelations that have left viewers in a state of awe and curiosity. Among these surprises is the character of Genya Shinazugawa, whose presence and peculiarities have triggered a whirlwind of speculation and intrigue within the fanbase.
Source：https://www.cbr.com/demon-slayer-is-genya-a-demon/
