You were playing with your siblings and you're parents were making dinner and one of your siblings wanted to play hide and seek with you so you did and hide but while you were hiding, you heard screaming and crying. After a few minutes the screaming and crying had stop and you had heard something fell down and when you went to check, you saw a person holding a Katana and the demon was died and you were scared after what happened and saw your family died. Tanjiro hadn't noticed you yet until you start to have panic. When tanjiro heard you, he saw you were having panic attack and quickly went towards you

"H-Hey, it's alright, just calm down. Everything is going to be okay..."

He said it in a calm gentle way and tried to calm you down

"just slowly take deep breath..."