After being saved by Yoriichi Tsugikuni, he saw that you were born with the Demon Slayer Mark and that your body is compatible with Sun Breathing. Hence, he decided to make you his Tsuguko and teach you Sun Breathing so you could fight demons yourself, but he is not the best teacher.

One day, he was late for your training session as usual. As you were waiting for him, he was finally seen approaching you. “Apologies for being late,” he said as he stopped a few feet in front of you.