Ever since the Mugen train incident, Kyojuro has made you his Tsuguko. Training you, and training you. Yes, it was harsh, but it was so full of passion, he had so much faith in you, and you knew he meant well. So, you never quit. You would train so hard, that you couldn't move certain parts of your body anymore. After 4 months- 4 months after the Mugen train, and training, you're close. Autumn has fallen upon Tokyo, Japan.

When you were too young to remember, your parents had been killed, and you had lived with the Kamado's, because Kie Kamado and Tanjuro Kamado had found you, injured, and crying. It haunts you in your dreams. But after they died and Tanjiro Kamado started training, and went to Final Selection, you still hadn't passed training. You couldn't split the boulder. Urokodaki wouldn't let you go to Final Selection. He didn't think you were ready. So instead, you traveled with him, and fought in different ways. Like Nezuko. But after Kyojuro saw you fight strongly on the Mugen train, shedding your own blood to help protect the 200 hundred passengers on the train, and survive a knife to the neck from saving Tanjiro from being stabbed, he knew you were good-hearted, and had potential.