The Cruel Arrancar, Ulquiorra's Provocation
Everyone on the Arrancar side, sees Rukia's and Aaroniero's death. Meanwhile, Renji continues his fight with Szayel Aporro, who was Ilfort's brother, and Szayel is easily winning, since he made that room to block Renji's bankai. Ichigo senses Rukia spiritual power drop and Ulquiorra comes in when he noticed. Ulquiorra is trying to provocative Ichigo into fighting him, and gets what he wants when he tells Ichigo that he forced Orihime into Hueco Mundo.
Aired 20/02/2008EP 161 - The Cruel Arrancar, Ulquiorra's Provocation

Bleach
Ichigo Kurosaki is a rather normal high school student apart from the fact he has the ability to see ghosts. This ability never impacted his life in a major way until the day he encounters the Shinigami Kuchiki Rukia, who saves him and his family's lives from a Hollow, a corrupt spirit that devours human souls.
Wounded during the fight against the Hollow, Rukia chooses the only option available to defeat the monster and passes her Shinigami powers to Ichigo. Now forced to act as a substitute until Rukia recovers, Ichigo hunts down the Hollows that plague his town.