NaNaNa Najahkoop

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

Appearance
NaNaNa has long, dark hair arranged into five fanned-out spikes and unusual teeth that alternate between black and white. The rest of his upper facial features, including his eyes, are covered by a mask with a slight depression in it. He wears the signature hooded-cloak of the Stern Ritter, although the right side of this is bunched atop his shoulder, revealing a small shirt beneath that leaves his abdomen and very thin arms bare. He also has a ring on each of his fingers and a bracelet on either wrist.

Personality
NaNaNa has little issue with criticizing his fellow comrades, including those of the Stern Ritter, and by his own admission, he has no understanding of art.

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, before traveling to Seireitei in order to participate in the conquest of Soul Society. Once there, he and the others create pillars of blue flame prior to engaging the Shinigami in battle. Encountering Captain Rōjūrō Ōtoribashi, who had just received word of casualties in his Division, NaNaNa inquires if anyone died but Rōjūrō refuses to answer. In a brief exchange of words, both declare that the other will soon be dead.