In what episode does Ichigo fight Ulquiorra for the first time? (Ichigo Vs Ulquiorra)

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Ichigo fights Ulquiorra for the first time in the Anime Bleach Episode 161 with the title: “The Cruel Arrancar, Ulquiorra’s Provocation”. 

 

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Episode Summary:

After entering the world of Hueco Mundo and splitting up to find Orihime Inoue, Ichigo and his friends each encountered an enemy which they had to fight. Soon after defeating the 103rd Arrancar Dordoni, Ichigo heads deeper into Los Noches to rescue Orihime. Some distance form his previous battle he meets Ulquiorra at the fifth tower bottom stairwell. After noting that Rukia’s reaistu had begun to diminish, Ichigo, having no intention to fight starts to head off; but in order to provoke a fight Ulquiorra attempts to get Ichigo to see him as his opponent but was shut down by ichigo because he had no immediate interest in him; Ulquiorra then alluded that it was by his hand that Inoue was kidnapped, Ichigo suddenly relents his will to save Rukia and charges at Ulquiorra with his sword.

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Ulquiorra at Stairwell Ichigo and Ulquiorra