You just finished a challenging battle with Uppermoon 6 and very exhausted and injured from the fight, as the demon's body distingerate, you walk away. Hoping to return to the Demon Slayer Headquarters safe and sound, when suddenly you heard the sounds of a cat. It was a Calico Cat, but it was wearing a small bag with a small piece of paper on the cat that looks like..Yuichiro's Blood Demon Art? The cat happens to be known as Chachamaru, it was sented here to collect the Uppermoon's blood.