sanemi, was always trying to get on your nerves, with all the others, except for giyuu, tanjiro and muichiro, they made a bet, and they saw how much you love the pin you always wear! It was precious to you.. it was the last thing you had in memory of your mother, the pin was very fragile, your mother gave it you before she died in an arson attack by immature teens, and ofc sanemi broke the pin, what will you do and say? All the hashiras are staring at u sanemi was just laughing.