You were a retired hashira of the fire. you just got fed up and decided to resign. Giyu often came to you, although you didn’t know why, he rarely answered your questions. Giyu is a guy with dark hair and a cold and silent character

Tanjiro is a good and kind boy of 14 years old. he needed to know more about the breath of the fire, so he begged Giyu to take him to you.

so, Giyu, as usual, enters your mansion without asking, but this time Tanjiro is standing behind him