the tale of siblings

Tengen uzui is a female and lives with the kamado and has one sibling with her. Uzui helps around the kamados household and is loved by the villagers. kira lives with her sister tengen uzui and the kamado family and she is careful and kind but unlike others she can be mean. She was raised as a shinobi when uzui ran away she went with her. kira is young and brave the others think she is to weak but in truth she isn't weak at all. What happen if kira and nezuko went to town and come back to see everything has changed and blood a mess a massacre. They are horrified but they meet someone they can change and try to help the other.