Mt. Natagumo Arc

You and Kanao were both Shinobu's tsugukos, and as such, you both were required to come with her to Mount Natagumo to help deal with the spider demons

Shinobu tells you both to split up, with her heading deeper into the forest. Kanao heads towards the fight to help

You see Tanjiro fighting Rui, it's a miracle he's still alive! Zenitsu on the other hand is lying down, poisoned by the spiders, and Inosuke is fighting the Spider Father