In what episode does Ulquiorra die?
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Rukia Kuchiki, Yasutora Sado, and Lieutenant Renji Abarai proved victorious in their battle against Rudbornn. Meanwhile back at Hueco Mundo, the unconscious hollified Ichigo and his opponent Ulquiorra continues their battle with Uryū and Orihime watching from the side-lines. The fight further intensified with hollow Ichigo having the upper hand in battle, which resulted in Ulquiorra receiving a serious blow. As Ichigo tries to finish off Ulquiorra for good, he is interrupted by Uryū. Uryū however got injured by Ichigo and gets saved by Ulquiorra at the last moment. The entire event led to Ichigo’s Hollow Mask breaking and falling off.
Without a moment’s notice after his mask broke, Ichigo came back to life and is in a disturbed state about what had happened while hollowified. Still wanting to settle matters Ulquiorra tries to rekindle the battle; he soon realized though that he was at his limit, as he is about to attack Ichigo. Suddenly his body started to disintegrate; his last words were shared with Orihime before his eventual death by disintegration.