Tanjiro begins to  smell the unfamiliar blood. “What is it?” said Paul Gekko. Tanjiro and Paul Gekko rushed to the house and saw Tanjiro’s family massacred except of Tanjiro’s sister, Nezuko. Paul Gekko carries Nezuko through the blistering cold of the snow with Tanjiro helping him. “We’re Almost there!” said Paul Gekko. “I could see the S.S. Atlantis from here!”

Suddenly, Nezuko began twitching and rears herself up as she groans in an animalistic manner. She grabs Tanjiro and Paul Gekko and hurls themselves off the mountain path down a cliff. Protected from the fall by the thick snow, Tanjiro looks up and sees his sister standing upright. Paul Gekko waves his hand as Tanjiro sees him and Nezuko. “Hey! Tanji!” Nezuko attempted to attack Paul Gekko. Tanjiro shouted, “PAUL GEKKO! Nezuko’s turned into an oni!”  Paul Gekko shouted, “NEZUKO! You have to stay strong! You can’t turn into a Demon! PLEASE!!” Nezuko’s humanity cries out, spilling tears onto Paul Gekko.

A young man wielding a sword speeds towards the siblings and leaps into the air. Paul Gekko notices him and forces Nezuko out of the way of the strike, to the swordsman’s confusion; his blade comes down. The force of the swing creates a windstorm that knocks them away.

The swordsman said, “Why did you dodge?” “These were my friends! I was taking them to safety!” said Paul Gekko. Unconvinced by her growling, he lunges forward and grabs her, too fast for Tanjiro to see and react. With the demon in his grasp, the swordsman informs Tanjiro his job is to kill demons and he will now decapitate Nezuko. “Hold on!” Paul Gekko cried. “Back at Kamado house, my friend smelled a murderer of his family. I think it was one of Eggman’s henchmen!”

“It’s simple,” said the swordsmen. “Because her wounds were exposed to demon blood. She is turned into a demon. That’s how man-eating demons multiply.” “Nezuko is not a man eating oni!” Paul Gekko cried. Tanjiro stomps on the ground. The mysterious swordsman added, “You must be serious.” “You’re wrong!” said Paul Gekko. “Tanjiro knows who she is! He can heal her! I can help Tanjiro turn his sister into a human being!”

“Please… don’t do this!” Tanjiro said. “Don’t kill her!” Tanjiro kneeled down and bows to the snow. “Tanjiro…” said Paul Gekko, thinking that he is praying. “You reminded me of grandpa Yahweh.” The swordsman clenches his teeth in anger and shouted, “Don’t grovel like that and give the enemy the chance to kill you!” Paul Gekko and Tanjiro turned to his attention. The swordsman continued telling them. All your doing is making yourself vulnerable! If it were a bit effective, your family would be alive! How can a stranger like you have any hope of letting Tanjiro heal his sister?! Or hunt down a demon?! Don’t make me laugh!” In the swordsman’s thoughts, he knew that Paul Gekko’s the prince of the Gekko Clan and Tanjiro’s resolve to protect what he holds dear.

The swordsman stabs his sword into Nezuko. “NEZUKO!” Paul Gekko and Tanjiro shouted. Tanjiro grabs his hatchet and circles his target, using the trees as cover. Paul Gekko uses his speed to confuse the swordsman and he and Tanjiro charged at him head on. Disappointed, the swordsman knocks the two out and notices that his hatchet is missing. He looks up and is nearly decapitated by the weapon flying through the air.

The swordsman is impressed by the Tanjiro’s resolve to save his sister, attempting to bring down his opponent after falling in battle. Nezuko breaks out. The swordsman ponders Nezuko’s state of mind as he dodges an assault from the newly-turned oni. Nezuko jumps off a tree and tries to attack him only to be knocked out by a imple karate chop. Paul Gekko woke up to find that Tanjiro and Nezuko vanished. “Paul Gekko…” said the swordsman. “I’m Giyu the Oni Hunter. I told Tanjiro to find a man named Sakonji Urokodaki who lives at the foot on Sagiri Mountain and keep Nezuko out of sunlight.” Giyu vanished without saying a single word. Paul Gekko noticed the graves of Tanjiro’s family and continues his long journey to to defeat the Galactic Eggman Empire as the S.S. Atlantis arrived.