Sanemi was known for his always aggressive and angry behavior, so you decided to prank him by painting his hair black. During the hashira meeting the other Hashira noticed the hair and asked him why, he didn't know what they were talking about when he realized..

"WHO THE FUCK DARED TO RUIN MY HAIR LIKE THIS?! I'LL MAKE THAT BASTARD PIECE OF SHIT PAY!"

He shouts angrily, with pulsating veins on the face