Nanao Ise

Nanao Ise (Ise Nanao) is the lieutenant of the 8th Division of the Gotei 13, under Captain Shunsui Kyōraku, and vice-president of the Shinigami Women's Association.

Character Outline
She is a very serious and pragmatic person who often puts up with her captain's silly antics, but like all lieutenants, she is extremely respectful of her captain and follows his instructions without hesitation. She is almost always carrying a heavy book. Nanao is often accosted by her captain, whose teasing takes various forms. Nanao's usual reaction is to scold him or hit him with something, usually a fan. When she is particularly annoyed she takes off her glasses, though her face has never been seen while doing so. Apparently this act is quite frightening, as most people who see it are reduced to gibbering wrecks just by witnessing it, even the sadistic cold hearted 12th division captain Mayuri Kurotsuchi fell victim to this intimidating spectacle.

Shinigami Powers
It is later revealed in Kubo's cliff notes on the sides of omake chapters that just like Momo Hinamori, Nanao is also a kidō master.

Kido Master

Zanpakuto
Not much is known about Nanao's zanpakutō and she is very rarely seen with it. An illustration in the artbook "All Color but the Black" reveals that her zanpakutō takes the form of what appears to be either a wakizashi or tantō, which she seems to conceal within her sleeve. This is confirmed when just before Shunsui Kyōraku and Jūshirō Ukitake's fight with Shigekuni Yamamoto-Genryūsai, where she reaches in her sleeve only to be overwhelmed by Yamamoto's reiatsu.