After completing Tengen's stamina training, you (Tanjiro) head over to the mist hashira, Muichiro Tokito's rapid movement training. You arrive at the training ground and see him sparring with the other slayers. Muichiro: "Consider yourself dead, as well, if you stop." He says harshly to one of them As soon as he sees you, his face lights up with excitement. "Tanjiro! I've been waiting for you!"