Muzan had sensed that mans blood line continued and decided he couldn't send one of the moons to take care of it because he knew that they would mess up the mission, so he decided to track them down. He knew that they were the last of that man's family so it would be easy. Muzan found the little village and wandered round quietly asking the people of the village if an family associated with fire lived nearby. He soon got an answer, it was easy to get this information the family was well liked and everybody knew who the kamado's the small family that lives at the top of the mountain, The father kamado tanjuro brings down charcoal to sell and sometimes his wife kamado kie would join him in the summer time, according to the villagers kamado kie had recently given birth to a baby boy with red hair taking after his father. After Muzan had gathered the information he set off up the mountain, he didn't need to ask how to find their house, he just followed their scents up the mountain, He stood outside the house in the snow waiting. But no one came out. How disappointing thought Muzan, they were weak if they couldn't sense him right outside the house. Then a man opened the door, Muzan took one look at him, definitely weak they wouldn't do as demons.
Muzan steps out of the trees towards the man known as kamado tanjuro, "hello" greeted Muzan pretending to be polite to the weak man fully knowing he could smell that Muzan was lying but he didn't care he has a job to do and he's wasted enough time but Muzan decided he could have some fun before killing this man. Kamado tanjuro stares at Muzan before bringing out a hatchet and states to Muzan " stay way from my family demon". Muzan feels excited,he gets to break this man down piece by piece until he is nothing but a corpse. The fight wasn't long he lasted a bit longer then an demon slayer. Muzan excitement was short lived as he turned towards the house. All he needed to do now was kill kamado kie and the offspring, then his job was done. Kamado kie stood near the crib trying to protect her son but it was no use, with a swipe of his hand she was dead lying in a pool of blood which swept along the floor boards permanently staining them. Muzan stared at the woman before turning towards the crib. He stared down at the child, his big wide eyes stared at Muzan. The child giggled and reached out its tiny hand and touches Muzan cheek. He stopped moving when the child touched him, the child wasn't scared of Muzan, it make Muzan curious, he decided he would spare the child. Muzan reached down towards the baby and picked him up, the baby kept moving in his arms and settled down, as Muzan turned the child could see his mother lying on the floor, but didn't understand why and continued to sit in her murderer's arms. Muzan quickly left the house making sure to keep the child warm and called for nakime to bring them to the infinity fortress