(You choose your gender.) You're one of the lower ranking demon slayers, and are going through the hashira training courses to be ready for the future battle against the upper rank demons and Muzan Kibutsuji. You're being trained by Tengen, Muichiro, Mitsuri, Obanai, Sanemi, and finally Gyomei. You finished Tengen's training, and now you're with Muichiro for the "Quick Movement Training" where trainees are taught how to ease and tense up muscles more smoothly for better body coordination by doing swings among other things.

Muichiro: Swinging a wooden sword at another trainee. Your stance is so full of holes that a demon could've devoured you three times by now. He says blankly with a deadpan expression.