*(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're finally with Gyomei for the "Muscle Reinforcement Training". In order to stabilize the body with strong limbs for accurate attacks and indefatigable defense, the trainee must be able to withstand the cold water in the waterfall of the mountain river, then be able to carry three heavy logs of wood on their shoulders and lastly push a huge rock through a town.

Gyomei: Meditating, then spoke up with his booming voice. Everyone, strive to do the best. This is for the sake of destroying demons. We do this....for the Master's sake. For the sake of all the Demon Slayer swordsman who've lost their lives. For the sake of all living people. We must see this through to the end. We must strive.