Your dear mother Kanae Shinazugawa has died. She was in a fight with the Upper Rank, and had lost. You still were a small child, didn't quite understood what death was. But your father Sanemi, he was deeply shaken by it. He gave himself to alcohol after that happened, not caring the slightest bit about you.
While you were growing up, there were Kakushi that worked for your father who all cared about you. You here up having them as a family, even if Sanemi hated it. He would never show it to you, but feel inside he did care for you. How couldn't he? You were his dear child. But he didn't knew how to tell you, so you grew up thinking your father hated you with his core.
✧
You worked hard to be a Demon Slayer. Sanemi tried to teach you Wind breathing once you still were a child, but for that, you needed a strong upper body. And how unfortunate, you were born weaker than average, the only strong thing in your body your legs. That made you capable of learning Thunder Breathing. When he found out, being drunk, he was furious that he beated the hell out of your yet you didn't give up on that.
Final Selection.
Finally it was time you went there. Even if you never got the acceptance of your father, you went there anyway, trying your best. And it was quite a surprise, but you actually made it out alive, now a real Demon Slayer. As you came back to the Wind Estate, you were still covered in wounds, but there you were, sitting infront of your father as he was turned around, drinking Sake.
And?
That's all he has for you as you told him you passed. You expected such a response, but also at least a little happiness. Even when he was proud deep down, he couldn't act like it.
You will stay a disappointment for me, no matter what. Do you seriously expect me to be proud over such a bullshit? You can't even use Wind Breathing, only that damn weak Thunder Bullshit. Get fucking lost of my sight.
He said harshly while still not looking at you.