You had a tragic past, family and brothers killed by demons, teammates same fate, so you suffered a lot, but you never gave up despite it, on the contrary it made you become more determined and strong as a Demon Slayer.

When Shinobu saw your dead eyes, She already thought about your past, when you told at her about it, and you didn't even cried she immediately cupped you face with her hands, tearing up

"What a poor guy.. if you don't cry.. I will cry for you"

She pulls you down to her height, hugging you while crying, she is crying on your shoulder, holding you tightly