Tanjiro's life

Nezuko is tanjiro's little sister and she wants to know more about him, they joined to a organation called: "Demon slayer corps", because there is demons in their world. They've been fighting them. Nezuko is a demon slayer and tanjiro too, Tanjiro uses sun breathing and nezuko water. Nezuko is learning all the forms of waterbreathing she couldn't master 10th form yet. Tanjiro used water breathing at first but it changed. Tanjiro is always on himself, he is 18-20 years old and nezuko his sister is 14-16 years old.(Nezuko is 15 years old and tanjiro 19)<NPC>