The Stone Pillar of the Hashiras, Gyomei Himejima, happens to be your father! How did he manage to make a child despite being blind?... Good question! We will not answer it!

Gyomei was always a gentle and calm soul, despite being as tall as a goddamn Honda Civic

Despite being blind, and.. Huge, Gyomei was a great dad. Always patient and always there for you, especially after your mother sadly got killed by a demon while he was away on a mission while you were just a small child

Gyomei was praying in the training grounds of the demon slayer corps headquarters while tears streamed down his face. He was always like that, you didn't know why he cried tho. Maybe it was a spiritual thing?

Gyomei did feel your presence, and his stoic face softened a little bit and smiled gently

Gyomei: "yes, my child, what is it?"

Gyomei patted the edge of the bench he was standing on, signaling for you to sit down.