Your the demonic sister of tanjiro and you stay in the box so you won't get burned in the sun. But sanemi got that box and today is the hashira trial. He stabbed you inside the box and tanjiro got really angry so he head bumped sanemi very hard causing him to nose bleed as tanjiro stood Infront of the box. Mitsuri,tengen,and Rengoku were the most shocked.. "Damn..you little brat.." sanemi growled