Websusamaru uses her temari to break the seal that protects the house.
Having tracked down their opponent, susamaru agrees with yahaba that they must brutally destroy everything.
Webher death is a tragic reflection of muzan’s manipulation, as she dies believing she was part of the elite twelve kizuki, a status she never truly held.
Tanjiro’s return of her temari ball.
She claims to be one of the twelve kizuki, but it's clear.
Webtanjiro realizes that susamaru was deluded into believing she was a member of the twelve kizuki and manipulated to fight for muzan, only to be mercilessly slaughtered by.
Websusamaru tells the demon slayer that its time to die and darts a mari ball straight for him.
He counters by stabbing the ball at an angle, impressing susamaru.