When Shiori learns that her grandfather killed her father, she ejects him from the barrier. Inuyasha proceeds to kill the bat demon with the Bakuryuha. Howeever, the ball in Shiori's hands becomes corrupted by her grandfather's spirit. As he tries to kill Shiori, the spirit of her father intervenes and creates a barrier to protect her. Inuyasha destroys the old bat demon's ghost and absorbs the power of the barrier-creating ball to learn about the barrier-destroying Red Tetsaiga.