Obanai Iguro

 The current Serpent Hashira who is always accompanied by his pet snake, Kaburamaru. He was raised by his family who served a snake-like demon to offer him as a sacrifice, until he was rescued by one of the Hashira and joined the Slayer Corps. He is infatuated with Mitsuri and gets easily jealous when she becomes close to someone else. Despite being blinded during the final battle with Muzan, he still manages to assist Tanjiro due to his connection with Kaburamaru, who allows him to see through its eyes thanks to Yashiro's magic scrolls. However, he ends up mortally wounded and declares his love for Mitsuri before dying alongside her. After his death, Kanao started taking care of Kaburamaru for him.