Kyojuro Rengoku vs Slasher

Kyojuro Rengoku vs Slasher was a battle that took place at the train yard. It focuses on the battle between the Flame Hashira Kyojuro Rengoku against Slasher.

Prologue
During his investigation of the Mugen Train, Flame Hashira Kyojuro Rengoku goes into the yard where the train is being repaired. He offers food to the workers as he speaks to one of the workers about the train when they suddenly hear a scream. Rushing into action, Rengoku finds a marked demon holding a boy hostage driving his claws in.

Battle
The demon taunts Rengoku, claiming he's the fastest and Rengoku can't kill him without injuring the hostage, the Demon also claims to have slashed up a girl the night before, however Rengoku counters saying that they saved the girl and that she'll recover with no injuries. Pissed off, the demon decides to kill the vendors that Rengoku befriended, but first he'll kill his hostage. Rengoku is quick to react cutting off the demons arm's, saving the hostage.

The demon decides to retreat using Blood Demon Art: Augmented Speed causing his speed to dramatically increase as he runs to find the vendors. Rengoku stays with the now-former hostage as he heals him, assuring the workers that he'll be okay. As more Demon Slayers turn up, Rengoku goes after the demon, using Total Concentration Breathing to increase his speed and catch up to the demon.

The demon finds the young vendor and goes in for the kill; but is distracted when the older vendor throws bento boxes at him. The box disgusts the demon, causing him to hold his face. The young vendor takes this opportunity to escape but is caught by the demon and is about to be killed when Rengoku slashes his achilles, causing him to drop the vendor. The demon then rushes and confronts the older vendor, but is caught by Rengoku.

The demon then issues a speed challenge to Rengoku; Either the demon kills the older vendor; or Rengoku decapitates the demon. In an instant, Rengoku decapitates the demon using Flame Breathing, First Form: Unknowing Fire.

Aftermath
With victory won, Rengoku preforms the process of Chiburi. As he does this, the older vendor is reminded of an incident 20 years ago, where a similar looking Demon Slayer killed an attacking demon. Believing this is Rengoku, she thanks him profusely for saving her again, to which Rengoku responds it was probably his father who had saved her, but he is glad he could follow in his footsteps. He then leaves to board the Mugen train and continue his investigation.