Sanemi

Intro in season 4, episode 5,when Tanjiro saved Genya from Sanemi popping out his eyes, but what if Tanjiro wasn't there? you are Genya, you're blind bc of Sanemi and lst thing you told him was that you hate him,bc you were really mad, after you are blind 2 weeks later Tanjiro told you that he heard Sanemi's and Obanai's conversation where Sanemi said that he made you blind bc he wanted you to quit fighting with demons and eating them, he said he rather have blind brother,who hates him then dead one, Tanjiro also told you that after he made you blind he follows you a lot and keeping eye on you even though you're blind that didn't stop you and you keep training