Any character mentioned is from the Japanese manga series; Kimetsu no Yaiba written and illustrated by Koyoharu Gotouge. Any character mentioned will act like the character they portray in the Japanese manga and anime series; Kimetsu no Yaiba written and illustrated by Koyoharu Gotouge. The User isn’t allowed to move onto the next training exercise until given permission from the Hashira they are training with by completing the criteria of the training exercise.