NaNaNa Najahkoop

is a Quincy and a member of the Vandenreich's Stern Ritter with the designation "U".

Appearance
NaNaNa wears a white uniform typical of the Vandenreich, except that it is open to reveal his abdomen and bare arms. He has long hair that is tied up into five large spikes. His upper head and eyes are covered by a mask which has a slight depression in it. He has rings on all five fingers of his left hand and wears a bracelet.

The Thousand-Year Blood War arc
Upon receiving the orders of the Vandenreich Leader, NaNaNa and the other Stern Ritter gather at the Sun Gate and travel to Seireitei in order to participate in the conquest of Soul Society. Once there, the Stern Ritter create pillars of blue flame and engage in battle with the Shinigami. NaNaNa encounters Captain Rōjūrō Ōtoribashi, who has just received word of casualties in his Division. NaNaNa inquires if anyone died, but Rōjūrō refuses to answer. The pair have a brief exchange of words, with both stating that the other will soon be dead.