NaNaNa "The Underbelly" Najahkoop

NaNaNa Najahkoop is a Quincy and a member of the Vandenreich's Stern Ritter with the designation "U - The Underbelly". Ability: NaNaNa can analyze the Reiatsu of a person, target their holes and then deplete their Reiatsu.

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NaNaNa was seen throughout the war, eventually using his ability to render Aizen unconscious. However he is then betrayed by Bazz B and falls in battle. In the CFYOW novels, he works under Mayuri as one of his zombies.